How are photosynthesis and cellular respiration related?
the processes are not related: photosynthesis occurs in plants and cellular respiration occurs in animals
photosynthesis and cellular respiration are part of the same electron transport chain
cellular respiration produces atp, which is used to power the steps of photosynthesis
the sugars produced in photosynthesis are broken down in cellular respiration

Option D, the sugars produced in photosynthesis are broken down in cellular respiration

Explanation:

Photosynthesis and cellular respiration are connected in a way that product of one is used as reactant in the other one. Here, the products of photosynthesis are used in cellular respiration. The glucose and oxygen produced during photosynthesis are used in cellular respiration to produce carbon dioxide and oxygen. Both the processes uses ATP as a source of energy

Hence, option D is correct

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.