Its b. Ecosystem
Population is the number of a species in an area, it has nothing to do with physical characteristics.
Abiotic is just an adjective meaning not alive
Competition is just the interactions between organisms in the struggle for food, water, space, mates, and many other things again not physical characteristics
Answer:
its o2 plz give brainliest
Explanation:
It shows how much or how little things change
Answer: white dwarfs, neutron stars, and black holes
Explanation:
