Question

a by stating unproven guesses about earths processes
b by relying solely on personal beliefs about the earths systems
c by providing explanations based on evidence and observations

Explanation:

Science is based on the scientific - method which involves making observations, formulating hypotheses, testing them with experiments, and drawing conclusions based on evidence. Options A and B are not how science operates as they rely on unproven guesses and personal beliefs respectively. Option C is correct as it aligns with the scientific approach.

Answer:

C. by providing explanations based on evidence and observations