Question

choose the best answer. what two parts does an experimental investigation have that a descriptive investigation does not have? a. hypothesis and communication b. hypothesis and variables c. hypothesis and conclusion

Explanation:

An experimental investigation tests a hypothesis by manipulating variables. A descriptive investigation just observes and describes. Variables are used to test the hypothesis in an experiment, which is not a key part of a descriptive study. Hypothesis - forming an educated guess, and variables - factors that can change, are unique to experimental investigations compared to descriptive ones.

Answer:

B. hypothesis and variables