Why is the inner core a dense ball of solid metal? A. Temperature allows the atoms to spread out.
B. Pressure forces the atoms to spread out.
C. Temperature allows the atoms to pack together.
D. Pressure forces the atoms to pack together.

so dont mind this it just said the answer have to be 20 words long (the answer should be B)

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.