to learn what organisms could survive in the lake to determine the age of the lake to understand how people use the lake to find out the depth of the lake
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A student uses a pH meter to measure the acidity of a water sample from a lake. For what purpose is the student most likely testing the water?
Possibilities:
- to learn what organisms could survive in the lake
- to determine the age of the lake
- to understand how people use the lake
- to find out the depth of the lake

to learn what organisms could survive in the lake