Which statement best describes how the information above relates to human activities?
a) human activities have increased volcanic eruptions.
b) overfishing of the world's oceans is leading to the extinction of some fish species.
c) nations of the world can work together to use energy more efficiently.
d) moving to cooler climates will save energy.

1. a tropical dry forest carries out more rapid nutrient cycling

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.