How do you guys study for Geography.?I would really appreciate your advices​

What is the speed of sound in water

Landmasses on a flat map look distorted because

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes.b. it burns more cleanly than crude oil products.c. scientists have developed new ways of extracting it.d. during its extraction, groundwater can be contaminated.