Answer:
Savanna do not exist in the united states because there are no true tropic climates.
Explanation:
Issun Sengeki... Messatsu!
Alike of what the other guy said, only the female mosquito sucks blood.
Being that this is true, the mosquito(s) could have been in any environment. They could carry diseases and illnesses. On top of that, they can carry microscopic organism, unlike diseases, that can cause infections.
If a portion of the grass was destroyed by wildfire, then the population of bison that feed on the grass will decrease. This is because there would be very little grass left for them to eat, and they don't eat anything else.