Why did the characteristics of the tools, technology, and equipment of ancient peoples change?

The ancient Egyptians believed that balance, harmony, in all aspects of life was most important and this value can be seen in almost all of their advances in the sciences and technology: what was found lacking in life was balanced by what was created by individual ingenuity.

the answer is d trust me

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.