Which take deoxygenated blood back
to the heart?

d) physical means can be used to separate the components of air.

because growing process had stoped after 4-5 year

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.