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Answer:
Comparative- investigations show relationships that do not always indicate cause-and-effect relationships.
Experimental- investigations cannot perfectly reproduce the conditions of the natural world.
Descriptive- investigations often are not repeatable because the results may change over time.
Explanation: I just did this on edge
The experimental investigation is best for the statement of Investigations show relationships that do not always indicate cause-and-effect relationships.
- Experimental investigations involve a process in which a "fair test" is designed and variables are actively manipulated, controlled, and measured in an effort to gather evidence to support or refute a causal relationship. Experimental investigations have a control group that does not receive any treatment.
The descriptive investigation is best for the statement of investigations cannot perfectly reproduce the conditions of the natural world.
- Descriptive research is used to describe the characteristics of a population or phenomenon being studied. It does not answer questions about how/when/why the characteristics occurred. Rather it addresses the "what" question
The comparative investigation is best for the statement of investigations often are not repeatable because the results may change over time.
- Comparative investigations involve collecting data on different organisms/objects/features, or collecting data under different conditions (e.g., times of the year, temperatures, locations) to make a comparison.
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