What is the relationship between the leach and plover

Leeches often attach the tongue of a crocodile and consume the crocodiles blood as food. The Egyptian plover is a bird that flies into the mouth of the crocodile and eat the leeches.

Explanation:

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.