Where does the food that animals and people eat come from? only animals that eat plants
only plants
plants and animals that eat plants
only animals
PLEASE HURRY I WILL REPORT LINKS BTW

answer: 45

explanationyou have to add as well to be it could be

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.