Africa is often termed “” because of the examples of advanced development found by archeologists.
a. the beginning of human history
b. the location of artistic development
c. the heart of islam
d. the cradle of art and civilization

The Heart of Islam is on the Arabian Peninsula - which is in Asia, so this is not the correct answer.

Human species is believed to have evolved in Africa - and because of this it is often called "the cradle of civilization"- so the correct answer is d)

Human history begins with written texts - which are more associated with Asia.

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.

Answer steam fog;