There are 4 outer atoms and lone pairs that are present in a molecule with a see-saw shape. It was called "seesaw" comes from the observation that it looks like a playground seesaw. It is very common that four bonds to a central atom result in tetrahedral or, less commonly, square planar geometry.
The answer to ur question is A
C. Because they contain water ammonia, and methane
the biome that is found at the biomes is called tundra
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