Question

a ____ is an explanation for an observation made multiple times and is usually based on sev positive proposal premise scientific theory speculation

Explanation:

• "Positive proposal" is not a term used to describe an explanation for repeated observations in a scientific context.
• "Premise" is a statement that forms the basis of an argument, not an explanation for repeated observations.
• "Scientific theory" is a well - substantiated explanation of some aspect of the natural world that is based on a body of facts obtained from repeated observations and experiments.
• "Speculation" is a guess or conjecture without much evidence, not based on repeated observations in a rigorous way.

Answer:

C. scientific theory