If the coast guard warns of a giant wave of water approaching the shore as a result of a major earthquake, they are warning of a. an aftershock. b. liquefaction. c. a tsunami. d. landslides.

It's C. a Tsunami ... aftershocks are smaller earthquakes that come after the main earthquake... Liquefaction is when the soil acts like a liquid because of sudden stress... and landslides are masses of rock that fall off a mountain or cliff

Brazzaville and kinshasha, luanda,librevilleand and monrovia.

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.