Which of the following changes in deciduous forests occurs in the winter?
a.
trees regain their leaves.
b.
trees block the flow of water and nutrients to their leaves.
c.
the leaves of trees begin to lose their chlorophyll.
d.
trees live off of stored nutrients.

answer; /// the correct )

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.