For a comparative or experimental investigation, scientists often make a testable hypothesis about a scientific question, and then they test it in the investigation ,therefore option (b) is correct.
What do you mean by hypothesis ?
The hypothesis is an assumption that is made on the basis of some evidence.
Characteristics of hypothesis -:
The hypothesis should be clear and precise to consider it to be relatable.
The hypothesis must be specific and sort and should have scope for conducting more tests.
Hypothesis helps us in a dealing of collecting, tabulating and analyzing data and other related information.
For a comparative or experimental investigation, scientists often make a testable hypothesis about a scientific question, and then they test it in the investigation ,hence option (b) is correct.
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