Atoms, molecules, organelles, cells, tissues, organs, organ systems, organism, population, community, ecosystem, biosphere are all parts of levels of ?

Why do oceanic plates tend to subduction when colliding with a continental plate

Select the correct answer from each drop-down menu proteins are

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?