You are presented with the quiz "What  can be used for communication by animals?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sound can be used for communication by animals" and "sound vibrations have different frequencies".   So, what's the best answer to the question?
OPTIONS:
- electricity
- energy
- Telephones.
- Vibrations.
- Stuffed animals.
- messengers
- courtship
- Cellular communication.

Answer: Vibrations.


You are presented with the quiz "Muscle and internal organs are protected by:"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "bone provides protection for soft tissues and internal organs" and "soft tissue refers to the soft connective or supporting tissues, such as muscle".   So, what's the best answer to the question?
OPTIONS:
- immunization
- fur
- fat
- bone
- hair
- skin
- defense
- copper

Answer: bone


You are presented with the quiz "what does androgen stimulate?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "testosterone stimulates the reproductive organs to develop into male organs" and "main androgen is testosterone".   So, what's the best answer to the question?
OPTIONS:
- Veins and arteries.
- heart
- reproductive organs
- allow growth
- brain
- Quality of life
- heat produced
- feet

Answer:
reproductive organs