Ahelicopter and a jet airplane must work against gravity in order to fly. which one flys faster

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

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.