Five examples of sub set

1) The set of all even numbers is a subset of the set of all integers.

2) The set of all squares is a subset of the set of all real numbers.
3) The set of all red flowers is a subset of the set of all flowers.
4) The set of all prime numbers is a subset of the set of all integers.
5) The set of all mammals is a subset of the set of all animals.