Answer: ⊆
Step-by-step explanation:
The answer will be ⊆ (is a subset of) if every set of brown rabbits is also a set of rabbits, but the answer will be ⊄ if not every set of brown rabbits is also a set of rabbits. Obviously, every brown rabbit is also a rabbit. With this in mind, the answer is ⊆.
{x|x is a rabbit} ⊆ {x|x is a brown rabbit}
The set of brown rabbits is a subset of the set of all rabbits.
