Two Parts

First sentence,  "way to access" and adding "array is "by" using an"  I think helps with reading your message.  
Second sentence, I thought adding a comma after number helps to slow the reader to focus on important information.

Author: GMDEEP

exercises/03.2-Retrieve-Items/README.md

@@ -4,7 +4,7 @@ tutorial: https://www.youtube.com/watch?v=rWYIgofIAME
 
 # `03.2` Retrieve Items
 
-The only way of accessing a particular element in an array is using an index. An index is an integer number that represents the position you want to access in the array.
+The only way to access a particular element in an array is by using an index. An index is an integer number, that represents the position you want to access in the array.
 
 You need to wrap the index into brackets like this:
 ```js