So abiotic means nonliving, so the only abiotic option is B. the gravel on the bottom of the aquarium.
Answer:
reverse fault & convergent boundary
Explanation:
because I feel like that the best option
Rain water is the greater effect
In summer, the amount of green pigment and chlorophyll are much more, in fall, the amount of chlorophyll and green pigment is less. That's the reason the leaves turn colors.
