How do decomposers increase the fertility of soil? 1. by storing moisture in the soil 2. by breaking down and digesting the remains of dead organisms 3. by making spaces for air and water 4. by burrowing deep below topsoil

decomposers help make soil more fertile by making the burrows and hole in the soil which soil more air. decomposers also eat your organic waste which leaves humus. humus is a very fertile substance that is good to plant a seed in.

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.