Answer:
A current in a fluid that results from convection; Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks.
Answer: On the Demographic Transition Model, it hold data on birth rates, mortality rates, and a country's current population.
Explanation:
The answer is b. Kathmandu.
A sonar receiver uses acoustical waves to detect and locate objects in the ocean