How do these control activities help protect a company against error, theft, and fraud?

How do these control activities help protect a company against error, theft, and fraud?

1. How do these control activities help protect a company against error, theft, and fraud?
2. How do control activities relate to the accounting system?
3. Why does a company give particular attention to internal controls for cash?
4. Why is it important to segregate the duties for handling cash from the duties for keeping the accounting records for cash?
How do these control activities help protect a company against error, theft, and fraud?