A hypothesis is A. a theory that has been proved. B. obeyed under any circumstances. C. a description of a pattern or relationship in experimental data. D. an educated guess or tentative explanation for a natural phenomenon.

D. an educated guess or tentative explanation for a natural phenomenon.

Explanation:

A hypothesis is an idea or explanation that is tested through study and experimentation. Outside science, a theory or guess can also be called a hypothesis. In other words, hypothesis is defined as a proposed explanation for a phenomenon.

A trial solution to a problem as a hypothesis is often called an educated guess because it provides a suggested outcome based on the evidence.

the speed increase from w to x due to increased gravity force

the speed decreases from x to y due to decrease in gravity

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project