You have a friend who has decided to start a facility that generates electricity from biomass. Part of the production of the facility
involves the use of a large amount of sand. Which of the following
processes is your friend most likely planning to use in their facility?
Select one:
O a Direct combustion
b. Gasification
Oc Anaerobic Digestion

should be Anaerobic Digestion

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.