The correct answer is letter D. Marine Ecosystem. Thirty-two percent of the world's producers is in the marine ecosystem. It is where most of the aquatic resources are located - mangroves, lagoons, reefs, sea floor, etc. The salt content here is higher compared to freshwater.
Answer:
Although the inner core is very hot, it is solid because it is experiencing very high pressure.
The outer core is not under enough pressure to be solid, so it is liquid even though it has a composition similar to the inner core.
Explanation:
The state of matter (solid, liquid or gas) of a given material depends on its temperature and pressure.
Naturally occurring solid material from which a metal or valuable mineral can be profitably extracted
zinc, tin
Answer:
irregular
Explanation:
Irregular galaxies have no regular or symmetrical structure. They are divided into two groups, Irr I and IrrII. Irr I type galaxies have HII regions, which are regions of elemental hydrogen gas, and many Population I stars, which are young hot stars.
