Question

what are the materials available from the external sources for the organism's consumption? ​

Answer 1

Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. ... Food is composed of molecules that serve as fuel and building material for all organisms as energy stored in the molecules is released and used.

Answer 2

Water, minerals, fruits, vegetables, nuts, medicinal plants