Which of the following best describes an ecosystem?
a.
all the living organisms in an area and their physical surroundings
b.
all the living organisms of the same species throughout the world
c.
a region with a distinct climate

b

Explanation:

ecosystem is a large community of living organisms (plants, animals and microbes) in a particular area. The living and physical components are linked together through nutrient cycles and energy flows. Ecosystems are of any size, but usually they are in particular places.

the two answers are

get thee back into the tempest and the night's plutonian shore

on the pallid bust of pallas just above my chamber door

dude, * is in your own words, not mine.

* = the answer