Question

Which of these is an abiotic factor of an aquarium ecosystem?

a
algae growing on the glass
b
gravel on the bottom of the aquarium
c
plants growing from the gravel
d
fish swimming in the water

Answer 1

B: gravel on the bottom of the aquarium

Step-by-step explanation:

Abiotic Factor means a non-living thing so gravel would be the best option.

Answer 2

b

Step-by-step explanation:

abiotic factors are nonliving things and gravel is nonliving so that has to be the answer