The answer to this is older, but it's not a proven fact even though schools teach it as if it were. It is still just a theory if you think about it with how much the earth moves, areas of rock could be complete upside down and no one would know, it would be like history in reverse.
Answer:
They are negatively affecting the niche of the insect in its habitat. The Insect might not survive this
Answer:
In case of sunstroke the body is unable to sweat because the body is dehydrated.
The temperature of the body won't increase further because there can be no more evaporation in body as it cannot sweat more from the skin surface.
The skin dissipates the heat and cools the body preventing the overheating of the body.
The skin appears to be red in color because the blood is dilated and dissipiated into the whole body for cooling.
