Question

1. what is the independent variable?

Explanation:

To answer the question "What is the independent variable?", we need to know the context of the study or experiment (such as what factors are being investigated, like in a scientific experiment, a psychological study, etc.). Since no context is provided here, we can only give the general definition:

The independent variable (IV) is the variable that is manipulated or controlled by the researcher in a study/experiment. It is the factor hypothesized to cause changes in another variable (the dependent variable). For example, in an experiment testing if "amount of fertilizer" affects "plant growth", the amount of fertilizer is the independent variable (it is controlled/changed to see its effect on growth).

However, without a specific study/experiment context, a precise answer about which variable is independent cannot be given. If this is part of a specific experiment (e.g., from a textbook or lab report), you would identify the variable that is intentionally changed (or is the "cause" in a cause - effect relationship) as the independent variable.

If we assume a common example (e.g., testing how different temperatures affect enzyme activity), the independent variable would be "temperature" (as it is the factor the researcher changes to observe its effect on enzyme activity). But since no context is provided in your question, the general definition and approach to identifying it are as above.

If you can provide the context (like the experiment or study this question is about), a more specific answer can be given.

Answer:

(General Definition) The independent variable is the variable that is manipulated or controlled by the researcher to observe its effect on another variable (the dependent variable). For a specific answer, provide the context of the study/experiment.