Which Are Places on Earth Where Convection Is Operating on a Grand

Multiple Choice

Which are places on Earth where convection is operating on a grand scale, creatingconditions important to life on Earth?

A) in the mantle
B) in hot springs like Old Faithful
C) in the troposphere, such as a summer thunderstorm
D) at the thermal vents in the rift valleys
E) All of the above are good examples.