A fire requires a by-product of what?
sunlight heat energy electromagnetic energy photosynthesis. evaporation heating liquids Electrical energy harmful substances
A B C D E F G H
They produce oxygen as a by-product of photosynthesis.
a fire requires a by-product of photosynthesis.
A fire requires a by-product of what? (A) sunlight (B) heat energy (C) electromagnetic energy (D) photosynthesis. (E) evaporation (F) heating liquids (G) Electrical energy (H) harmful substances