Answer: One biome I learned would be the desert biome and how there are oasis and other things you can find there, etc...
Explanation:
From the insects and the worms they eat.
Lack predators and other natural controls
They only looked at one school which is not representative of all students in schools. There could have been an illness going around at this particular school but they have nothing to compare their results to. There should be a control group of students at normal temperatures to compare results of the temperature difference effect also.