Generate a rule that describes the relationship between these two words.
Petal, Flower
A petal is a specific component part of a flower that is typically colorful and often serves to attract pollinators. Hence, the rule that describes the relationship between petal and flower is that a petal is a structural feature of a flower.
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a rule that describes the relationship between these two words.

### Input:
Petal, Flower

### Output:
A petal is a specific component part of a flower that is typically colorful and often serves to attract pollinators. Hence, the rule that describes the relationship between petal and flower is that a petal is a structural feature of a flower.