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(A) closely related species in different niches
(B) closely related species in similar niches
(C) unrelated species in different communities
(D) unrelated species in the same community occupying different niches
(E) ecological equivalents in different niches

Other countries are just as mean?? I feel like America is mean in its own ways though.. In stupid ways.. lol Being competitive and cut throating in jobs. Always out to make a buck. Screwing people over with car deals. It is all about greed and corruption in America.
I feel like in other countries though they have their own crazy stuff. They might not have corporations, but they have terrorist they are training and people killing each other and crazy rituals.
So in the end, the entire world has its own ways of being mean and promoting injustice.. It’s all just a matter of how your country handles things. For us BIG BUSINESS is the way. For others TERRORISM is the way. We all have our corrupt niches. Right?

How they have each adapted to their environment, and any niches in that environment, and then a comparison of the three 🙂 thank you x

A} a niche can be shared by two species if their niche are very similar
B} niche subdivision may occur
C} one species will eliminate a competing species if their niches are very similar
D} competition ends in worlwilde elimination of a species

how are they similar? how are they different? and how might their differences enable them to occupy different niches?
make it brief.
plz, thanks :))

also…
b.) What was the critical evolutionary event which led to the tremendous diversity of grazing animals?
c.) What can be said regarding the spread of mammals into various niches of life [air, fresh water, oceans, land]?