Which of the following is used when a friend suggests that the key to losing weight is eating less and exercising more?

The answer is: Logos

In persuasion, Logos is a method to persuade people by using logic rather than emotion or ethical standard.

This means that persuasion made by logos will be objective, factually correct, and can be backed by scientific evidence.

In the example above, the friend suggested the other person to eat less and exercise more to lose weight. (no mention of feelings or moral). We can conclude persuasion is based on logic since in order to lose weight you need to burn more calories than you eat. This can be done by eating less and exercise more.

personal-

communication, mobility, cooking, using the telephone, cleaning the house, doing laundry,   going to the bank, and managing medications.

social-

music, art groups, cooking and gardening. outdoor activities are shopping, eating out, theatre trips and sailing.

ethical-

honestly, integrity, loyalty