Answer:
Differences in air pressure, due to differences in elevation, trigger the development of different types of caterpillars.
Explanation:
A hypothesis can be described as a tentative statement which can either be supported by evidence from experiments or it can be discarded if the results of an experiment do not support a hypothesis.
In the scenario, mentioned in the question, the air pressure had nothing to do with the different type of caterpillars being formed neither was it the focus of the experiment. Hence, the above mentioned hypothesis will not be supported by the experiments.