Explain how global warming occurs on earth, how human activity has contributed to global climate change, and how global climate change affects marine primary productivity and marine animal migration.

Global warming occurs because of the carbon dioxide and various other gases being abundant in the ozone layer and the humans pump out more carbon dioxide in daily life. Humans have added carbon dioxide in various ways. Such as driving, cultivating animals, etc. Since the waters are warmer because of global warming, marine animals will go extinct since they can't adapt fast enough and are suited to a certain temperature.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.