What most likely happens if water flows through a permeable soil layer and reaches a clay layer? It dries up. It soaks in. It pools on top of the clay layer. It flows down through the clay layer.

maritime tropical may be your answer.

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.