Answer:
d. sewage treatment and nitrous oxide
Explanation:
My qualitative observation that the flower on the right had larger petals proved to be a great piece of evidence for my research project.
It is true that a<span>n ecologist who is studying the relationships among the dominant communities in a geographical region is studying a biome.
A biome is a group of ecosystems that have the same climate and similar dominant communities, so you can see that the answer to this question is T.</span>
