Question

Why do flies rub their hands against eachother befor putting them on the object they are sitting on?

Answer 1

Answer:

When you see flies sitting on the windowsill rubbing their legs together, they are cleaning themselves. They have to keep these sense organs clean so they can fly with precision to find food and mates and avoid predators.

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Answer 2

Answer:

To clean their feet.

Insect have to remove molecules from their sensing organs in order to use them. Molecules from dirt and food stick to their sensing organs, blocking other molecules from touching the organs. and keeping their sensors and their eyes free of dust and dirt helps them see around clearly .