The most likely source of water polluting pathogens is
a. agricultural runoff
b. surface runoff
c. sewage discharge
d. mine drainage

The correct answer is C. sewage discharge.

Even though there might even be no harmful pathogens at all if there isn't any waste, it is correct because it is implied that there is waste such as fecal matter inside of the sewage discharge.

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask

Aplant cell has vacuoles and a cell wall