What is the biological vector for african sleeping sickness?
mosquito
tsetse fly
deer tick
sand fly

Tsetse fly

Explanation:

African sleeping sickness is also known as trypanosomiasis, may be defined as vector borne disease that is caused by trypanosoma.

The vector for the African sleeping sickness is tsetse fly. These flies may have acquired infection from the animals or the human beings.

Thus, the correct answer is option (2).

a community that experiences major changes undergoes progress

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.