What is caused by friction between two objects?

Moist air

Dry air

Static electricity

A circuit

i say static electricity because for example you rub a balloon onto your head it sticks to your hair because you caused friction which made static.

so answer static electricity.

Explanation:

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a