The body part is (a)  

We us our (a)   To listen music.

We us our (a)   To kick a ball.

We us our (a)   To taste a food.

We us our (a)   To smell food.

We us our (a)   To reads book.

We us our (a)   To eat.

We us our (a)   To hold a spoon and fork to eat.

We have (a)   Senses.

Our senses of sight let's us (a)  

We us our (a)   To feel and touch.

He wash (a)   Before waiting and after using the toilet.

He tales his ... To get energy for learning and playing.

(a)  

He brush his (a)   To keep them clean.