humans are known as complex organisms and are more advanced than other complex organisms
give your reasons.

due to the complex nervous system and the ability to think symbolically

Explanation:

Of all living beings, humans are those with the most complex nervous system.

In the evolution, human beings developed rational skills that allowed them to create artifacts or tools with stones´pieces to make their clothes and to be able to feed themselves with the animals they hunted, meanwhile   they could be able to create language!. Although it is known that some animals have a rudimentary language from which they can communicate each other in their group, human language is a very complex system of symbols and we are the only living beings with the ability of writing.

Besides, the human being has the capacity to create culture: a complex system of laws, norms, religion, traditions, ways of living, etc.

the supermassive black hole is in the middle of the galaxy.