Does anyone know what are anthropogenic sources of greenhouse gases? if you do please help.

i've only got 85 points so I'll go with 25 to spend on this question. ​

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

the correct answer is d

answer increasing the intensity, duration,and frequency of exercise progressively;