Physical is something you can have/ hold and mental is something in ur head that you can't see or hold.
Biosphere- protect habitats
Atmosphere- reduce auto emissions
Hydrosphere- reduce,reuse,recycle
Geosphere- limit fertilizer
Solar planet in an undiscovered solar planet. With no other living organisms at its surroundings.
It’s b, biocrusts help the environment
D.) a unicellular organism that has a simple structure and is commonly found in human intestines.