the bottom or base of the food chain are plants or producers that through photosynthesis have converted sunlight into chemical energy usable by life.
(the bottom or base of the food chain; are; plants or producers that through photosynthesis have converted sunlight into chemical energy usable by life) (plants or producers; have converted; sunlight; into chemical energy usable by life)
the bottom or base of the food chain plants or producers
are have converted
plants or producers that through photosynthesis have converted sunlight into chemical energy usable by life
sunlight into chemical energy usable by life