Why do you think a "one-way" digestive tract is more efficient?

Answeryehe:

b because i dont care and i need points

Explanationbaby:

most community's take hundreds of years to become stable

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: