Answer:
d. sewage treatment and nitrous oxide
Explanation:
<h2>ecosystem services provided by biodiversity, such as nutrient cycling, carbon sequestration, pest regulation and pollination, sustain agricultural productivity. Climate change and other stresses have the potential to make major impacts on key functions, such as pollination and pest regulation services.</h2><h2 />
<span>the outer ear is used to collect sound waves.
</span>
The answer could be any of the following:
* energy
* sugar
* carbohydrates
* (possibly even) food.
The Correct Answer is: D. 1,2,4
