Line segments have two end points
rays only have one end point
Climate change causes problems in our environment. The change in climate caused ice to melt and temperatures to rise. Because of the rising temperatures, habitats can be ruined and the animals that depend on that land and are living there can go extinct.
The correct answer is - d. colder and denser.
The main differences between the surface currents and deeper currents are the temperature and density, and that actually decides their position in the water, on the surface, or deeper.
The surface currents are warmer, and because they are warmer the molecules are much more loose, so the density is lower, which in return makes it easier, thus it is in the surface.
The deeper currents are colder, and because they are colder the molecules are much closer and more concentrated, so the density is higher, which means that they are heavier, thus fall deeper below the easier currents.