Answer:
The first three look like clear quartz then the last two might be obsidian
Explanation:
Tried my best hope this helps!
Answer:
that's very broad, is that the whole question?
True. Things such as a sponge, placozoa and stuff can be unicellular. But other bigger animals are multicellular, like a whale or dog.
i think that the answer to this question could be A.stock
Tadpoles has gills ...and after metamorphosis frog gets lungs and an additional skin / cutaneous respiration !
so answer is A
