Willie S. appeals a juvenile court judgment terminating his parental rights over Jason J. and choosing adoption as the preferred permanent plan. Willie contends he is a father within the meaning of Adoption of Kelsey S. (1992) 1 Cal.4th 816 (Kelsey S.), and thus the court violated his due process rights by terminating his parental rights without making an express finding of unfitness. Alternatively, he contends the court may not terminate the parental rights of a mere biological father absent a finding of unfitness. Additionally, he challenges the sufficiency of the evidence to support the court's finding the beneficial parent-child relationship to adoption is inapplicable. (Welf. & Inst. Code, § 366.26, subd. (c)(1)(B)(i).)*fn1 We affirm the judgment.