Please help me, im studying for finals and i need an answer to this question! Will mark brainliest for the answers that are the best!

Which best explains why an iceberg floats?

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action