What two factors explain why topsoil is lost?

Whenever soil is exposed , water and wind can erode it qucikly. when the wind blows hard it picks soil up and moves it. water because the was erodes it and can cause mud slides

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.