The Great Zimbabwe was the center of a huge trading empire.

the home of Shaka and his powerful army.

where the remains of the earliest humans were found.

Correct answer is the center of a huge trading empire.

Explanation:

The center of a huge trading empire is the correct answer because it refers to a huge empire that was a center of trade in the region between 11th and 15th Century.

B is not correct as Shaka Zulu was a military leader on the soil of todays South Africa, known as Zulu Kingdom.

C is not correct as the first hominid named Lucy was found in Ethiopia.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.