One factor that favored the spread of islam to west africa was

Islam also spread into West Africa through the activities of Muslim clerics, marabouts and scholars or mallams. These clerics or learned men founded their own religious centres which attracted students from all parts of the Western Sudan and who on the completion of their studies and training went back to their own homes to win converts.

Explanation:

it refers to race, i am pretty sure this was a popular term in nazi germany or something.

the neolithic revolution began the era of permanent societies, the reliance on the limited amount of land gave way to political organization and this political organization caused social organization which was divided by amount of property and power.

the neolithic revolution (new stone age) was the first agricultural revolution. it was a gradual change from nomadic hunting and gathering communities and bands to agriculture and settlement. this period is described as a "revolution" because it changed the way of life of communities which made the change.

sentence:

let´s farm and domesticate these animals so we do not be hunting in the woods all the time