Question 7 of 20 : Select the best answer for the question.
7. Which of the following provides an accurate description of sea surface salinity along the equator?
O A. Sea surface salinity at the equator is low due to freshwater input via precipitation.
O B. Sea surface salinity at the equator is low due to loss of freshwater via evaporation.
O C. Sea surface salinity at the equator is high due to freshwater input via precipitation.
O D. Sea surface salinity at the equator is high due to loss of freshwater via evaporation.

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.