What's the answer to this?

Why is it incorrect to say that mitochondria function only as energy factories with cell

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

What is the main fuel source for the work of the cell