Question: If creating paper makes the air dirtier, then what does creating paper do? Answer choices: - duplicate itself - Makes the air dirtier - Makes food - Cleans the air - converting electricity to heat - to move people - Plant growth is reduced - Lengthens tree life
Answer: Makes the air dirtier

Question: If sound can be used by animals to share information, then what can be used by animals to share information? Answer choices: - books - RNA - energy - thoughts - media - warmth - saliva - sound
Answer: sound

Question: If mammals contain keratin, then what do mammals contain? Answer choices: - food - ghosts - keratin - Animal fur - magic - soul - alveoli - four limbs
Answer:
keratin