Question

use the drop-down menus to complete the statements.
investigations are best for demonstrating cause-and-effect relationships.
investigations are usually less time-consuming and less expensive.
investigations make it possible to study a wide range of variables.
dropdown options: descriptive, comparative, experimental

Explanation:

To solve this, we analyze each type of investigation:

1. Demonstrating cause - effect: Experimental investigations manipulate variables to show cause - effect, so the first blank is "Experimental".
2. Less time - consuming/expensive: Descriptive investigations (observing/describing) are simpler, so the second blank is "Descriptive".
3. Study wide range of variables: Comparative investigations compare groups to study many variables, so the third blank is "Comparative".

Final Answers:

1. Experimental
2. Descriptive
3. Comparative

Answer:

To solve this, we analyze each type of investigation:

1. Demonstrating cause - effect: Experimental investigations manipulate variables to show cause - effect, so the first blank is "Experimental".
2. Less time - consuming/expensive: Descriptive investigations (observing/describing) are simpler, so the second blank is "Descriptive".
3. Study wide range of variables: Comparative investigations compare groups to study many variables, so the third blank is "Comparative".

Final Answers:

1. Experimental
2. Descriptive
3. Comparative