In the savanna community there are herds of zebras, stands of acacia trees, clumps of grasses, prides of lions, and insects everywhere. What is one example of a savanna population? A.
the pride of lions

B.
all of the acacia trees and grasses

C.
all of the predators in the area

D.
the animals, plants, rainfall, temperature, and water supply

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.