Final answer:
The subject of this question is Abel, as mentioned in the verse from Hebrews 11:4.
Step-by-step explanation:
The subject of this question is a biblical story from the book of Genesis in the Hebrew Bible. In Hebrews 11:4, the verse is referring to Abel, who is the subject of the question. Abel is mentioned as someone who testified of his gifts and continues to have an impact even after his death.