Some grammatic changes (#1685)

content/roadmaps/106-javascript/content/109-javascript-functions/105-scope-and-function-stack/102-closures.md

@@ -1,6 +1,6 @@
 # Closures
 
-Function closures are one of the most powerful, yet most misunderstood, concepts of JavaScript that are actually really simple to understand. A closure refers to a function along with its lexical scope. It is essentially what allows us to return a function A, from another function B, that remembers the local variables defined in B, even after B exits. The idea of closures is employed in nearly every other JavaScript program, hence it's paramount for any JavaScript developer to know of it really well.
+Function closures are one of the most powerful, yet most misunderstood, concepts of JavaScript that are actually really simple to understand. A closure refers to a function along with its lexical environment. It is essentially what allows us to return a function `A`, from another function `B`, that remembers the local variables defined in `B`, even after `B` exits. The idea of closures is employed in nearly every other JavaScript program, hence, it's paramount for a JavaScript developer to know of it really well.
 
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