Which of these transitional words signal to the reader that there will be an 'addition'?   a. incidentally b. meanwhile c. furthermore d. nevertheless

The answer would be "furthermore" because you adding on to your thought.

Hope this helps!

here is proof that the other person was correct :)

They value cattle and identify as cattle herders.They rely heavily on the weather.They take responsibility for the care, feeding, and protection of animals.They include cattle in their spiritual and community rituals.

Explanation:

The Maasai are an ethnic group that inhabit Kenya and northern Tanzania. The Maasai are a semi-nomadic group. Their main economic activity is cattle herding, and cattle hold a very important place in their society. The Maasai rely heavily on the weather, even though their agriculture is very limited. The text "The Beginnings of the Maasai” touches on all of these topics.