Answer:
Daphnia is an ideal system for studying multiple stressors because of its short generation time, well-studied ecology and evolutionary history, wide geographical distribution across many limnetic systems, high mutation and recombination rates, high sensitivity to changes in environmental conditions, unique cyclical
Explanation:
The answer is that they do not live on or in the body of a host.
The three different material that can erupt from a volcano is
1. Magma/lava (called Basaltic Lava)
2. Ash/ tephra
3. Igneous rock
I'd say option 4, because all of those are capable of changing the enviroment
