Please help me my reading doesn't help me understand this

Mineralized veins containing valuable metals were deposited by:

fast-flowing liquid lava
hydrothermal fluids
volcanic ash
erosion

For one week be an inventor and write down ideas for products or services that you think should be produced

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

The process by which liquid water changes into water vapour is called what ?