Question

1. a hypothesis often predicts a cause and effect relationship between variables in an experiment. the cause is the select variable and the effect is the select variable

Explanation:

In experimental design (a key concept in scientific research, often in Natural Science subfields like Biology, Psychology etc. for studying relationships), the independent variable is the one manipulated (the cause) to observe changes in the dependent variable (the effect, which depends on the independent variable). So the cause - related variable is independent, and the effect - related variable is dependent.

Answer:

First "Select" box: independent; Second "Select" box: dependent