The common feature among animals is that they are considered

Animals are considered to be heterotrophs as a heterotroph is being classified in an organism if it has the capability of ingesting and absorbing organic carbon in means of having to maintain its life as it is a way of having them to produce and synthesize the energy and compounds that they require and have acquired in their body.

b

is correct hope this   also i learnd this in middle school

1. a tropical dry forest carries out more rapid nutrient cycling