Which of the following is not a way in which trees benefit the environment?

a.

they remove a significant amount of carbon dioxide from the atmosphere.

b.

they remove a significant amount of oxygen from the atmosphere.

c.

their roots hold soil in place, reducing rates of erosion.

d.

they remove ozone and particulates from the atmosphere.

the denominator has a very specific role.

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.