number of fish. depth of the lake. quality of the water. speed of the water.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Scientists go to a lake once a month to take samples of water. They are most likely studying the
Possibilities:
- number of fish.
- depth of the lake.
- quality of the water.
- speed of the water.

quality of the water.