Examine the diagram provided. Based on the diagram, which organisms compete for food resources?

Antelopes and Squirrels depend on grass (a food resource), and in turn the predators (hawks, mountain lions, coyotes) depend on the herbivores.  

Explanation:

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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.