Plate tectonics are important to geoloigists because they explain how the continents make up the earths crust.
A factor in determining the carrying capacity of a city's environment is the water resources available to meet city needs. This is assuming this is one of the following city needs in this question. This is the only answer that pertains to the environment.
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Answer:

Explanation:
Given:

Required:
Coordinates of the Midpoint of HX
Solution:
Midpoint (M) of HX, for
is given as
.
Let 

Thus:

Convert to improper fractions





Answer:
Because Africa is such a hot continent, lots of water gets dried up and evaporate. If we could have a better irrigation system and use rivers from around the continent, Africa could potentially start farming with the water they gain from the improved irrigation system.
Explanation: