The properties of an air mass are mostly determined by the

Source region where the air mass formed

Explanation:

Air mass is the body of air that has almost the same conditions . These conditions include the temperature and the humidity of that region.

Temperature is the measure of the hotness or coldness of the air while the humidity is the measure of the water vapor present in the air.

the answer is 12 as i may remember

: )

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.