In order to be considered work, the components that must be present are (2 points) a force and a movement in the same direction as the force. an action which causes no movement or reaction. an action which causes movement and an opposite reaction. a force and a movement in the opposite direction of the force.

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.