Which of the following is true about seismic waves and earthquakes? a) the most destructive waves are surface waves. b) the last waves to occur are body waves. c) ground failure is a direct result of surface faulting. d) building tilting is mostly a result of liquefaction.

The answer is; A

Surface waves are more destructive than body waves because they travel through the crust on which we build structures and they are low-frequency waves. The deeper the epicenter the lower the destruction of surface waves. There are two types of surface waves; Love and Rayleigh waves.  

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.