Atype of non fiction which explains a particular subject is called what?

Write a syllogism in the space provided below. if written for me, you will receive 40

Hurry need it ! 35 points in achebe’s things fall apart, the igbo people live in a patriarchal society; accordingly, they worship several different gods all property and authority belong to men all business transactions are done by barter they live under the authority of a foreign ruler

What should you most consider when deciding whether an image is appropriate for your technical document?