input: OPTIONS:
- strong hands
- vocal cords
- powerful lips
- healthy lungs Now, answer this question: Q: What is necessary in a person who wishes to play wind instruments? A:
A:
output: healthy lungs

Q: What kind of light ranges from red to violet? A:

OPTIONS:
- infrared light
- x rays
- ultraviolet light
- visible light

Answer: visible light

Problem: OPTIONS:
- Molecular Bromine Gas
- photons bromine gas
- gaseous bromine gas
- elemental bromine gas
Q: Q: What gas can be generated by reacting sodium bromide with elemental chlorine? A:
Answer: elemental bromine gas

Problem:OPTIONS:
- nutrients
- pathogens
- proteins
- chemical signals

Q: Hormones, ions, and neurotransmitters are all types of what? A:
****
A: chemical signals

Q: What is considered to be a unique feature of echinoderms? A:
OPTIONS:
- oil vascular system
- air vascular system
- iron vascular system
- water vascular system
water vascular system

Q: Scientists think the solar system formed from a big cloud of gas and dust called what? A:
OPTIONS:
- comet
- supernova
- Oort cloud
- nebula

Answer:
nebula