Here's how to break down the meaning:
* "The sun peeked..." This implies that the sun is acting like a person, specifically peeking out from behind something as if it's curious or excited.
* "...happily..." This gives the sun a feeling of joy or contentment.
* "...from behind a cloud..." This tells us that the sun was previously hidden by the cloud and is now emerging.
Therefore, the phrase suggests that the sun is emerging from behind a cloud in a joyful and playful manner. It creates a positive and hopeful image, possibly indicating the beginning of a sunny day or the passing of a storm.
The use of personification makes the image more vivid and relatable, suggesting a sense of optimism and cheerfulness.