Explain how two instrument could be used to produce a pulsing sound, and identify the name for this pulsing sound

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. this is an example of speciation.

Number and variety of living organisms includes genetic, species, and ecological types

What is true of sea slugs in these orders