- The spectral classes of four stars are shown in comparison with a Hertzsprung-Russell
diagram.

I uplоadеd the answеr to a filе hоsting. Herе's link:

cutt․ly/tcMG2bP

it is either c or d and i know for sure it is not a or b

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: