Which of the following do scientists use to form a hypothesis? 
A.
A question and observations

B.
A conclusion and data

C.
A conclusion and a theory

D.
A question and opinions

Explanation:

The scientific method involves making observations and asking questions. Scientists form hypotheses based on these observations and then develop controlled experiments to collecting and analyze data. Using this data, they are able to draw conclusions and form questions for new scientific research.

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the movement of aircraft through clouds can even cause lightning strikes. a single lightning event is a "flash", which is a complex, multi-stage explosively ejected.

explanation:

and the person below goggled it.

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tracks, burrows, eggshells, nests, tooth marks, or gastroliths