Organisms which "hold an ecosystem together" because they have a significant role to play are called A. endemic species
B. native species
C. niche species
D. keystone species

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.