The knowledge about interior of the earth is obtained through direct sources and indirect sources. Direct sources include rock materials from mining areas and molten magma from volcanic eruptions. ... Indirect sources include meteors that at times reach the earth, gravitation, magnetic field, and seismic activity.
Answer:
C and A
Explanation:
Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.
The chocolate hills are a tourist attraction in Bohol and they are covered in green grass that turns brown which makes it look like chocolate.
two feuding giants threw rocks at each other. they fighted a lot which lasted for days.
since they were tired, they forgot about their feud and became friends, but when they left, they forgot to clean up the mess they had made during their battle, hence the Chocolate Hills.
