Why does germany currently face a problem with its social security system? a-does not have a high-technology workforce b-it lacks access to markets for its pruducts c-it has an aging population d-it lags behind europe in industrial output

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

In what way does renewable energy differ form nonrenewable energy?

What characteristic of the basin that feeds the congo river system affects movement in central africa? a. the center of the basin is a dense rain forest. b. it is the center of ethnic conflict in the area. c. wildlife on the savanna makes it too dangerous to travel. d. the basin is surrounded by desert.