How does a cartographer determine which map projection to use?

What is the name of the ocean current that affects the british isles? how does it influence their climate?

Does anyone know the answers for these

Technology has affected regional settlement patterns in what ways? choose all that apply. climatic improvement strategies have improved crop productivity. mechanized agricultural methods have improved agricultural productivity. participation in the global economy has increased urbanization. population shifts from urban to rural areas has increased as a result of petroleum production. settlement areas have increased as a result of improved water storage and delivery systems.