1.which organism is an animal?
a. lion
b. puppy
c. earthworm
d. all of them

2.organisms that can make their own food are called
a. autotrophs
b. heterotrophs
c. consumers
d. decomposers

3.animals that have backbones are called
a. vertebrates
b. coelenterates
c. mollusks
d. invertebrates

answer; the above statement is (true);

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: