Which is an example of an instinct? a rabbit hides when it observes a predator. a dog wags its tail when it hears a doorbell ring. a boy pulls his hand away after touching a hot surface. a dolphin swims through a hoop during an amusement park show.

 A rabbit hides when it observes a predator.

Explanation:

An instinct is an inborn pattern of activity or behavior shown by the animal. It is peculiar and specific for a biological species. Among the options given, A rabbit hides when it observes a predator. is the correct option. As it can be define as an innate behavior because to save it's life becomes the first priority of any animal in nature. If an animal detects danger it tries it's best to save itself.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.