Chemical pollution is correct
Europeans wanted to expand their land, which would increase their power.
<span>The oldest people in the population may be much older than the average life expectancy due to the more quality food source in the area. The addition of modern medicine, also, drastically helped provide longer life expectancies for many of the people.</span>
Answer:
Group size
Explanation:
In an experiment the change of one variable over the other is measured.
The variable which shows changes because of another variable is called the dependent variable.
The variable which changes on its own and causes a change in the dependent variable is called the independent variable.
Here the survey measured how the satisfaction of the people varied in relation to the group size. Hence, the group size is the independent variable and the satisfaction is the dependent variable.
