I think that these are the answers
is the least dense planet in the solar system
has captured asteroids in its orbit
is the most massive planet in the solar system
I may be wrong but I think it’s the second one. They speed up reactions, and there’s a certain enzyme for a certain reaction.
This might be a bad idea as a lot of animals live in wetlands
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I hope this help but the metalloids is gruop five if that what your asking if not i will answer the other question for you