fix(curriculum): fixed typo in JavaScript arrays review and quiz (freeCodeCamp#61770)

Author: sinha21Soumya

curriculum/challenges/english/25-front-end-development/quiz-javascript-arrays/66edcccbba6dacdb65a59067.md

@@ -44,7 +44,7 @@ console.log(numbers[10]);
 
 #### --text--
 
-Which of the following is the correct way access the string `"Jessica"` from the `developers` array?
+Which of the following is the correct way to access the string `"Jessica"` from the `developers` array?
 
 #### --distractors--
 

curriculum/challenges/english/25-front-end-development/review-javascript-arrays/6723c66f623701a3cdf72130.md

@@ -25,7 +25,7 @@ developers[1] // "Naomi"
 developers[10] // undefined
 ```
 
-- **`length` Property**: This property is used to return the number of items in a array.
+- **`length` Property**: This property is used to return the number of items in an array.
 
 ```js
 const developers = ["Jessica", "Naomi", "Tom"];
@@ -123,7 +123,7 @@ desserts.unshift("ice cream");
 console.log(desserts); // ["ice cream", "cake", "cookies", "pie"];
 ```
 
-- **`indexOf()` Method**: This method is useful for finding the first index of a specific element within an array. If the element cannot be found, then it will return -1.
+- **`indexOf()` Method**: This method is useful for finding the first index of a specific element within an array. If the element cannot be found, then it will return `-1`.
 
 ```js
 const fruits = ["apple", "banana", "orange", "banana"];
@@ -160,7 +160,7 @@ const newList = programmingLanguages.concat("Perl");
 console.log(newList); // ["JavaScript", "Python", "C++", "Perl"]
 ```
 
-- **`slice()` Method**: This method returns a shallow copy of a portion of the array at a specified index or the entire array. A shallow copy will copy the reference to the array instead of duplicating it.
+- **`slice()` Method**: This method returns a shallow copy of a portion of the array, starting from a specified index or the entire array. A shallow copy will copy the reference to the array instead of duplicating it.
 
 ```js
 const programmingLanguages = ["JavaScript", "Python", "C++"];

curriculum/challenges/english/25-front-end-development/review-javascript/6723d3cfdd0717d3f1bf27e3.md

@@ -786,7 +786,7 @@ desserts.unshift("ice cream");
 console.log(desserts); // ["ice cream", "cake", "cookies", "pie"];
 ```
 
-- **`indexOf()` Method**: This method is useful for finding the first index of a specific element within an array. If the element cannot be found, then it will return -1.
+- **`indexOf()` Method**: This method is useful for finding the first index of a specific element within an array. If the element cannot be found, then it will return `-1`.
 
 ```js
 const fruits = ["apple", "banana", "orange", "banana"];
@@ -823,7 +823,7 @@ const newList = programmingLanguages.concat("Perl");
 console.log(newList); // ["JavaScript", "Python", "C++", "Perl"]
 ```
 
-- **`slice()` Method**: This method returns a shallow copy of a portion of the array at a specified index or the entire array. A shallow copy will copy the reference to the array instead of duplicating it.
+- **`slice()` Method**: This method returns a shallow copy of a portion of the array, starting from a specified index or the entire array. A shallow copy will copy the reference to the array instead of duplicating it.
 
 ```js
 const programmingLanguages = ["JavaScript", "Python", "C++"];