During the entire month of June, temperatures increase in the Northern Hemisphere and decrease in the Southern
Hemisphere.
What causes these temperature changes?
The Sun reaches its lowest point in the sky
The Sun reaches its highest point in the sky
The north end of Earth's axis is tilted toward the Sun
The south end of Earth's axis is tilted toward the Sun

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.