1+1=? i am extremely stuck on this one

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

What is the measure of angle x? answer

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20