Final answer:
The scenarios that demonstrate ethical behavior include a company voluntarily recalling a defective product, an employee reporting a theft, and a cab driver returning a found wallet.
Step-by-step explanation:
Out of the given scenarios, the following demonstrate ethical behavior:
Scenario 1: A company voluntarily recalls a defective product or one that is potentially dangerous. This is an ethical behavior as it prioritizes customer safety over profit.
Scenario 3: An employee reports a theft carried out by another employee. This is ethical as it upholds honesty and integrity in the workplace.
Scenario 5: A cab driver finds a wallet in his taxi and turns it in. This is ethical as it demonstrates honesty and respect for the property of others.