Pls help i need this to finish my assignment Why did the toy car stop? where did the energy go?

For some context im doing this experiment for my science class and i had to roll a toy car across a room.

it would be c. predictability

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.