Describe three ways soil can be damaged or lost

Soil can be damaged or lost through:
Soil erosion; When the land is left bare without plantation the soil is carried away by runoff water.
Soil can also be damaged through infertility caused by land overuse. When people use land too much and is not given time to regenerate its fertility, it becomes damaged and cannot produce healthy crops.
Soil can be damaged through release of harmful industrial affluent into the soil. The chemical substances in the industrial waste alter the soil pH hence it is damaged.

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.