What is predicted to happen if the permafrost in the arctic melts?
a. bacteria will be unable to carry out their role as decomposes
b. plants will absorb large amounts of carbon dioxide
c. dead plants will fail to decompose
d. decomposing plant matter will release large amounts of carbon dioxide

The answer is letter. D

Decomposition would happen in this area if permafrost melts. The event would allow the release of carbon dioxide from organic matter which would fasten heating and melting. There are researches that this process would soon affect 60% of the Northern Hemisphere's permafrost by 2200 and would release almost two hundred billion tons of carbon dioxide.

Source : https://www.wunderground.com/resources/climate/melting_permafrost.asp 

Correct answer choice is:D. decomposing plant matter will release large amounts of carbon dioxide.Explanation:

It would depend on wherever the permafrost was though this has the ability to largely stimulate weather variance. Regions of permafrost may hold enormous reserves of methane, such as in portions of Russia. If the permafrost renders this methane is discharged. Methane is a very powerful greenhouse gas, powerful than CO2. This is an example of the so-called tipping points behind which it may be difficult to transpose global warming.

It is believed that permafrost thawing could increase global warming by discharging methane and different hydrocarbons, which are potent greenhouse gases. It also could boost depletion because of permafrost grants resistance to desolate Arctic slopes.

1- a    2 - d3 - e4 - f5 - c6 - g7 - h8 - b

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