How is the use of local time inconvenient in practical life? ?

Witch one is it soo it the the question b.a,b,c,d

How do convection currents form underwater mountains?

When geographers describe how two places are related to each other spatially, they are describing a. where the places are located in relation to one another b. what kinds of natural environments are around each place c. how each place is changing over time d. what kinds of cultures are in each place