The dictionary definition of solder is any of various alloys fused and applied to the joint between metal objects to unite them without heating the objects to the melting point. So the answer is mend.
Its A. Mend
I needed to add more characters soooooo
Just did the test I this hope it helps someone in the future!
Answer: the two of us depended on each other and became family
Explanation:
their love grew for each other - blood relative or not - and they are a family
