Tolerance can cause an overdose true or false

Hello!

The answer to this question is true.
Tolerance simply means how much of the drug a person can take before being affected. A low drug tolerance can easily lead to overdose. However, a high tolerance can also cause an overdose for a different reason. 
A person with a high tolerance must need more of the drug to feel a certain effect, or high, from the drug. This also may make the person feel invincible to overdose if he can handle higher quantities of the drug than most other people. This can cause the person to take more of the drug because he believes that he will not be negatively affected by it. Eventually, the person may reach the point where his body can no longer accept the drug, and this will ultimately lead to overdose.

I hope this helps answer your question! Feel free to comment or message me if you have any further questions!

Ancient Egyptian writing became more complex over time.

Explanation:

The given excerpt tells us that ancient Egyptian writing became more complex over time. Writing in Egypt began about 3100 B.C. and it consisted only of hieroglyphs of names or titles that accompanied images of important people. However, by 2500 B.C. ancient Egyptian writing became more complex - complete sentences began appearing on tombs, as well as lists of offerings to the Egyptian gods. We can conclude that, from then, their writing became even more complex.

The text doesn't claim that ancient Egyptian writing was found only on tombs, that only wealthy people had tomb inscriptions, or that most of the Egyptian writing was about Egyptian gods. These things are mentioned, but that doesn't mean that they were the only things that existed. This is why the first option is the correct one.