Problem: OPTIONS:
- anal cavity
- eye cavity
- fluid cavity
- nasal cavity
Q: Q: Respiratory development in the embryo begins around week 4. ectodermal tissue from the anterior head region invaginates posteriorly to form olfactory pits, which fuse with endodermal tissue of the developing pharynx. an olfactory pit is one of a pair of structures that will enlarge to become this? A:
Answer: nasal cavity

Problem:OPTIONS:
- aluminum
- dirt
- bronze
- iron

Q: Where does the purple color in quartz come from? A:
****
A: iron

Q: What do bees carry from one plant to another to facilitate plant growth and development? A:
OPTIONS:
- nutrients
- spores
- fungi
- pollen
pollen

Q: While in the lungs, blood gives up carbon dioxide and picks up what element before returning to the heart? A:
OPTIONS:
- nitrogen
- methane
- hydrogen
- oxygen

Answer: oxygen

Question: Q: What does magma that cools underground form? A:
OPTIONS:
- chambers
- new crust
- fluctuations
- instrusions
Answer: instrusions

input: OPTIONS:
- after a hurricane
- when faults form
- before an eruption
- after an eruption Now, answer this question: Q: When does a caldera form? A:
A:
output:
after an eruption