Answer:
a. oriki
Explanation:
The Yoruba people believe that communication with the gods and ancestors happen through chants and songs of praise combined with dance. What are these chants called oriki . As oriki is poem and form of poetry consisting of praise and singing or to describe attributes.
The only species that of hominid that still exist today is homo sapiens or us.
The most significant immediate impact of the Columbian exchange was the cultural exchanges and the transfer of people (both free and enslaved) between continents.
I believe the answer is: Primary
For example, let's say take a look at normal employees at a company.
For most of them, the main reason they spend their time to do the job correctly is to obtain money/salary even though they have to spend their time being scolded by unlikable boss.
In the scenario above, we can say that money is the primary reinforcer for the target behavior