Question 3
Why is the pair of testes situated outside the body, in the scrotum?
The right answer is the one marked above.
Sperm production needs a temperature lower than body temperature. The process is very sensitive to temperature, and healthy sperm will not form at the temperature of the body itself.
The arrangement looks careless until you know what it is for — which is exactly why the other options sound plausible. The ovaries, by contrast, sit safely inside the abdominal cavity, so there is clearly room.