In a building, a system is installed that uses the geothermal energy in summer to cool the building and the same energy to warm the building in winter. which is this system?

by drinking easy

very easy

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).