Question

which of these explains what a theory is?
the explanation of why a hypothesis is disproven.
a set of observations about an experiment.
a model of the atom.
a possible explanation for why something happens.

Explanation:

A theory is a well-supported, coherent explanation for a phenomenon. The first option refers to explaining a disproven hypothesis, which is not the definition of a theory. The second describes experimental observations, not a theory. The third is a specific scientific model, not the general definition of a theory. The last option matches the core idea of a theory as an explanatory framework for why events occur.

Answer:

A possible explanation for why something happens.