Apossible explanation of or answer to a scientific question that is based on prior knowledge or research and is testable is called a O law.
O hypothesis.
O theory.
O experiment.

The correct answer is hypothesis.

Explanation:

The hypothesis can be defined as a provisional prediction or explanation (as long as it is not tested) of the relationship between 2 or more variables. Thus, the problem-question precedes the hypothesis-answer which, in turn, derives from the objective (s) of the research.The hypothesis, as a formulation that raises a presumed relationship, can be expressed in the form of a proposition, conjecture , assumption, idea or argument that is temporarily accepted to explain certain facts.

satellites are frequently used to make observations of the orbit on earth

d. cellulose and starch