Question

a(n) ____ is a proposed explanation for a phenomenon and a starting point for further investigation.
observation
analysis
hypothesis
peer review

Explanation:

A hypothesis is a proposed explanation for a phenomenon that serves as a starting - point for further investigation. Observations are the initial noticing of a phenomenon. Analysis is the process of examining data or information. Peer review is the evaluation of work by others in the same field.

Answer:

C. hypothesis