Answer:
There are two reasons: at higher altitudes, there is less air pushing down from above, and gravity is weaker farther from Earth's center. So at higher altitudes, air molecules can spread out more, and air density decreases
C is the answer to question 22
Answer:
2
Explanation:
when the soil in not fertile enough is hard to plant the vegetables and even If we do plant the vegetables on an infertile soil the vegetation could grow poorly
