The number of times a machine multiplies the effort force is?

a) resistance force
b) effort distance
c) mechanical advantage
d) efficiency

Mechanical advantage is a force which is measure of a force amplifying effectiveness of a simple machine.so the number of times a machine multiplies the effort force is mechanical advantage .
hope this helps

This  kingdom  is  made  up of species that  do  not really easily fit into other kingdoms such as the plant, animal,and  fungi  kingdom. some protists, such as the paramecium  and  amoeba, feed  on  other  organisms  while others such as algae are able to  make their own food  through the process of photosynthesis.