Please help I’ll mark brainlist

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

Which of the following is not a subset of {1,2,3}?

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?