Which is a result of a seasonal change (meaning a change that happens over and over at a certain time of year)?

a. trees destroyed in a forest fire

b. plankton dying due to pollution

c. fish moving to cleaner water

d. birds migrating to a warmer climate

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.