fixed typos (#33529)

guide/english/certifications/front-end-libraries/react/compose-react-components/index.md

@@ -1,15 +1,15 @@
 ---
 title: Compose React Components
 ---
-## Compose React Components
+# Compose React Components
 
-### Hint 
+## Hint 
 
-Use nested components as in the previous challemge to render components.
+Use nested components as in the previous challenge to render components.
 
-### Solution
+## Solution
 
-The following is the solution to the chakkenge, where it render Citrus and NonCitrus in a component which is then rendered in another:
+The following is the solution to the challenge, where it render `Citrus` and `NonCitrus` in a component which is then rendered in another:
 ```jsx
 class Fruits extends React.Component {
   constructor(props) {