Willl give a brainlest both active solar heating systems and passive solar heating systems must face south use pumps and fans only work during the daytime reduce the need to use fossil fuels

Reduce the need to use fossil fuels.

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:

multiply it by 5 in order for you to understand i cant give an exact answer.