Desertification <span>is the persistent degradation of dryland ecosystems by variations in climate and human activities.</span>
Answer:
b. Providing habitats for wildlife
Explanation:
<em>Dead trees and down wood provide wildlife habitat it is estimated that 2/3 of all wildlife use them at least during one point of their life cycle.</em> They also serve to cycle nutrients, decreasing erosion, etc.
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Answer:
Increased pollination rates of surrounding crop plants as a result of local beekeeping.
Explanation:
A positive externality arises when the production or consumption of a finished product or service has a significant impact or benefits to a third party that isn't directly involved in the transaction.
A negative externality arises when the production or consumption of a finished product or service has negative impact (cost) on a third party.
Coase theorem was developed in 1960 by a British economist and author named Ronald Coase.
Coase theorem states that when the actions of a party (X) negatively affects or harm another party (Y), then party Y should be able to create an incentive for party X to stop or limit the action creating such harm.
Generally, when transaction cost are low, the two parties are able to bargain and reach a mutual agreement in the presence of an externality such as a pollution.
I think its B, but im not sure i hope this helps:)