The cardiovascular system is comprised of 2 body systems that work together to... send electrical signals to our lymphatic system to fight of pathogens.
B. provide movement for the body from responses and stimulus to and from the brain.
C.
pump blood, which carries nutrients and oxygen to the cells of the body.
D. breaks down nutrients to circulate towards our cells for ATP.

C.

pump blood, which carries nutrients and oxygen to the cells of the body.

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explanation:

ok

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: