B. Ipaliwanag: bilang isang mag-aaral, ano ang magagawa mo upang matulungan ang ating kalikasan sa mga epektong dulot ng paglaki ng populusyon? pakisagot naman po ng maayospleas...

a

explanation:

sorry, but you do not have posted the diagram.

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.