What effect does decreasing the temperature of a room have on a lifespan of a battery? Which variable is highlighted in red, bolded tex?

a
Independent
b
Dependent
c
Control
d
None

This question is incomplete. There is no highlight in red bolded text in the question but the answer to both the independent and dependent variables will be provided and explained in details.

Independent variable: decrease in temperature

Dependent variable: lifespan of battery

Explanation:

The independent variable of an experiment refers to the variable that is changed or manipulated by the experimenter in order to bring about an outcome. In this experiment, the DECREASE IN TEMPERATURE is the independent variable because it is what is being changed to effect a response in the battery lifespan.

On the contrary, the dependent variable is the variable that responds to the manipulation of the independent variable. In other words, the dependent variable is the outcome. In this experiment, the LIFESPAN OF THE BATTERY is the dependent variable because it is what is responding to the changes made by decreasing the temperature (independent variable)