CAN SOMEONE HELP ME.. THIS IS DUE IN 30 MINS

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

896.31 cm= km 100cm = 1m 1000m = 1km a) 0.0089631 b) 0.0089631 c) 8.9631 d) 89.631

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