Atopographic map would be most useful for which activity

A topographic map is a detailed and accurate representation.

Explanation:

A topographic map represent all made made and natural features on the earth's surface. This can be used for different purposes or activities like- hunting, fishing, hiking, surveying an area, urban planning and so on. A topographic map has a distinct feature that is three-dimensional shape is modeled by the contour lines. Topographic maps are produced by NTS- Canadian National Topographic System.  Topographic maps can describe the vertical information through the use of contour lines.

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.