Match your vocabulary word to its definition.

Carbon Nuetral - Doesn’t increase carbon dioxide in the atmosphere 
desertification - decomposed organic material
eutrophication - nutrient-enriched water body
exclave - disconnected part of a country
fallout - radioactive waste
gorge - ravine
mulch - increasesd aridity
peat - prevents erosion 

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.