They can be replaced by a healthy environment
Answer:
C
Explanation:
Population is the number of simular species in the area, so the land and fish don't count.
FAULT-TOLERANT computer systems are systems that are built with
the ability to keep working to
a level of satisfaction, even in the presence of faults within one or more of
its components. <span>This
fault tolerant ability is sometimes referred to as graceful degradation</span>
