Ascientific explanation for a natural occurrence is called

The correct answer is hypothesis.

Explanation:

A proposed illustration of a phenomenon is considered as a hypothesis. A scientific method requires one to test the hypothesis in order for a hypothesis to become a scientific hypothesis. Scientific theory and a scientific hypothesis are not the same things. A provisionally accepted hypothesis that has been suggested for further research is termed as a working hypothesis.

i believe the correct answer is d

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.