phytoplankton
Phytoplankton is the most abundant producer in the ocean and on Earth. These primary producers are microscopic plants that float freely.
Zooplankton make up the base of the ocean food chain (along with phytoplankton) and therefore are the largest in numbers.
insects There are a few abundant land animals. Most of the abundant animals are insects.
hydrogen
The most abundant mineral in the ocean floor is basalt. There are also some other minerals like sand, gravel and granite that are found in the ocean floor.
The Atlanic ocean and the Pacific Ocean have the most animals
Magnesium.
the ocean.
Hydrogen I think.
the ocean.
The most abundant dissolved salt in ocean water is sodium chloride. It is a colorless crystalline compound with the chemical formula of NaCl.
Collagen
oxygen and water
Phylum Athropoda, ( The Arthropods) as they contain the insects of which there are 800 000 species and the insects are the most abundant animals on earth.