1. **Problem Statement:** Identify which of the given events are simple events. 2. **Definition:** A simple event is an event that consists of exactly one outcome. 3. **Event (i):** Tossing a coin and getting a head. This event has only one outcome: head. So, it is a simple event. 4. **Event (ii):** Rolling a die and getting an even number. Possible outcomes are 2, 4, 6. Since it includes multiple outcomes, it is not a simple event. 5. **Event (iii):** Selecting one marble from 1 red, 2 white, and 3 yellow marbles and getting a red marble. This event has only one outcome: red marble. So, it is a simple event. 6. **Conclusion:** Events (i) and (iii) are simple events, while (ii) is not. **Final answer:** (i) and (iii) are simple events.