Why was the marina district, san francisco, heavily damaged in the 1906 and 1989 quakes?
a. shaking was no more extensive than elsewhere in the city, but the whole district burned following each quake.
b. the epicenters of both quakes were right under the district.
c. liquefaction and foundation failures were common.
d. the area is built on consolidated rock, causing the shaking to be amplified.

What is the relationship between an area's geography and the temperature of its surface water? a. areas at high latitude have the warmest water because their days are longest b. areas at high latitude have the warmest water because they have the longest seasonsc. areas at low latitude have the warmest water because they receive the most direct sunlightd. areas at low latitude have the warmest water because they have the least change in temperature throughout the year