It’s an organ that is part of the circulatory system
ANSWER:
I think it's the second one.
EXPLANATION:
in primary succession newly exposed or newly formed rock is colonized by living things for the first time. in secondary succession an area that was previously occupied by living things is disturbed, then recolonizeed following the disturbance.
D) It is based on the position of rock layers.
ether patatos or bread is my best guess
I hope this helped
Jan Ingenhousz discovered photosynthesis
