What type of ice is capable of freezing in salt water?

Sea ice is the correct answer because it forms specifically in oceanic conditions where saltwater is present. As seawater begins to freeze, the process results in the formation of ice that contains a certain amount of salt, making it capable of developing in the saline environment. This ice can also have a brine solution that occurs as the water freezes, which is why sea ice can contain pockets of liquid brine.

Freshwater ice, on the other hand, forms from bodies of water such as lakes and rivers where the water is not saline. Glacial ice originates from the accumulation and compaction of snow on land and is not formed by freezing seawater. Brine ice, while it does result from freezing seawater, is not a term typically used to describe the larger bodies of ice that we consider when discussing ice types in the context of geographic formations, but rather specific mixtures that can occur in association with sea ice.

Thus, sea ice is distinct in its ability to freeze directly from saltwater, highlighting its unique properties and formation processes in marine environments.