The ............ of the moon is the period time for the moon to complete a cycle the lunar phases and is approximate 29.5 days long.

Options

A. sidercal period
B. saros cycle
C. synodic period
D. eclipse season

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a term that describes the time it takes for the moon to complete a cycle of its lunar phases.

2. **Identifying the Key Concept**: The lunar phases refer to the different appearances of the moon as observed from Earth, which change over time due to the moon's orbit around the Earth.

3. **Determining the Duration**: It is mentioned that this cycle takes approximately 29.5 days.

4. **Finding the Correct Term**: The term that describes the time it takes for the moon to complete a full cycle of its phases is known as the "synodic period."

5. **Final Answer**: Therefore, the complete answer to the question is: "The synodic period of the moon is the period time for the moon to complete a cycle of the lunar phases and is approximately 29.5 days long."

---