Answer:
B. to understand the world around us
Explanation:
The percentage of alleles for homozygous recessive would be 50%
The right answer is the burning of fossil fuels.
While all these proposals have a bad impact on the biosphere, Proposal B is the only one that has a direct link to climate change.
Air pollution by combustion is an alteration of air quality that can be characterized by measurements of chemical, biological or physical pollutants present in the air, with consequences that are detrimental to human health, to living beings , climate, or material goods.
I believe the anwser you are looking for is the
Cell Membrane.
It is a substance that lets things in and out of the cell
