A C and D. It cannot be b because scientists have warned people in the past about volcanoes and their possibility for erupting. Earthquakes cannot be predicted however there are warning signs one can look for.
Physical, Political, and Special purpose
Protection of water sources
soils formation and protection
nutrient storage and recycling
pollution breakdown and absorption
contribution to climate stability
maintenance of ecosystems
recovery from unpredictable events
The answer should be true !
