Which son did Eve say God had granted her in place of Abel?

Answer: Seth

Eve named him Seth, saying, "God has granted me another seed in place of Abel, since Cain killed him."

“And Adam again had relations with his wife, and she gave birth to a son and named him Seth, saying, “God has granted me another seed in place of Abel, since Cain killed him.””— Genesis 4:25 (BSB)