What part of an ecosystem provides the energy needed for primary producers to make food?

The sun, or abiotic factors

Explanation:

Primary producers are organisms that make their own food, such as plants. They do this through photosynthesis, which requires sunlight, water, and carbon dioxide.

sediment layers stop spreading when they reach a barrier or they run out of sedimentary material. lateral spreading is the movement of gently to steeply sloping, saturated soil deposits caused by earthquake-induced liquefaction. i hope this . : )