Question

suppose evidence shows that all local ponds are eutrophic; what might you deduce? the eutrophication is not caused by fertilizer runoff. the eutrophication is not part of a natural process. the eutrophication is part of a natural process. the eutrophication is caused by fertilizer runoff.

Explanation:

Eutrophication can be natural or caused by human - activities like fertilizer runoff. If all local ponds are eutrophic, it could be due to a natural process as it affects all ponds uniformly without clear indication of human - induced factors like fertilizer runoff being the sole cause.

Answer:

The eutrophication is part of a natural process.