ANSWERS: 3
  • The scrotum is an adjustable device designed to keep the testicles inside at the right temperature. When it is too warm, it lets them down to cool in the breeze, and the scrotum becomes smooth and relatively large. When it is cold, it pulls up to keep them warm, which makes it wrinkly and small.
  • Insulation to flexability to name two
  • To allow for the gravitational pulling of the Moon.

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