The answer to your question is answer choice .1 Independent variable.
Causes:
1. the increase in population and growth of the human race
2. the need for housing and industrial advancements
effects:
1. loss of habitat for wildlife
2 loss of trees for oxygen
Pollination stage is when plant modify the environment just saying I am a 6th grader so like I am not that smart so it might be very wrong
Answer:
It has increased
Explanation:
The concentration of carbon dioxide in the atmosphere has increased in the last 200 years. The extra carbon dioxide is causing an enhanced greenhouse effect greater than would happen naturally.
<span>Mechanical waves....</span>
