I would have to say probably d.
Answer:
Desert, Plain, Taiga, Tundra, Wetland, Mountain, Mountain range, Cliff, Coast, Littoral zone, Glacier, Polar regions of Earth, Shrubland, Forest, Rainforest, Woodland, Jungle, Moors.
Explanation:
Distribution of sunlight. Why is an organism's niche like a person's occupation? An organism can "make a living" and survive in its niche. a natural phenomenon that maintains Earth's temperature range.
Number 6. Response to stimuli. At least I think. Or 6, homeostasis.
<span>the variety of life in the world or in a particular habitat or ecosystem
</span>