Which is a safer car bumper in a collision on that flexible and retractions or one that is rigid? why?

Answerboth technicians (a) and (b);

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.