I believe the answer is: d. the shell and the skeleton
The shell and skeleton in architecture would act as the main foundation that support the weight of the whole building. The strength of shell skeleton would determine whether the building would collapse during natural disaster such as earthquakes.
Answer:
C.
Explanation: It cant be option A because agriculture is not the most important in the economy. Hope it helped :)
Yes, they are because they don't get out and exercise enough.
