Scientists observe the world around them, from which to draw questions. Their predictions as to the answer are what we call a “hypothesis”. Thus, a scientist’s job is to answer the very hypotheses that they and their piers come up with.
Science is a branch of knowledge which explains the natural phenomenon or process of our surrounding nature. The branch tries to answer the scientific questions after the logical and sequential steps of the scientific methods are followed.
In a scientific method, to answer a scientific question, the scientific hypothesis is constructed which could be proved on the basis of experiments based on which results could be concluded.
Thus, scientist performs experiments to understand and answer the hypothesis, therefore, option-A is correct.
Although the moon's distance from earth varies each month because of its eccentric orbit, the moon's mean distance from Earth is nonetheless increasing at the rate of about 3.8 centimeters (1.5 inches) per year
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