Choose the word which is different from the rest:  Mother, Friend, Sister, Father, Brother
Friend is a term reflecting a bond that is not genetic
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Choose the word which is different from the rest:  Mother, Friend, Sister, Father, Brother
### Input: 
### Response: Friend is a term reflecting a bond that is not genetic