Why is Fe very abundant in the inner core of a dead star?*1 pointIt is due to the release of energy upon formation.It is due to the input of energy upon formation since energy of the star is already used up.It is due to energy changes upon formation.It is due to low energy requirement upon formation.

Iron (Fe) is very abundant in the inner core of a dead star due to the process of stellar nucleosynthesis. Here's a step-by-step explanation:

1. Stars generate their energy by fusing lighter elements into heavier ones in a process called nuclear fusion. This process begins with the fusion of hydrogen atoms to form helium.

2. As the star ages and the hydrogen supply decreases, the star begins to fuse helium atoms to form even heavier elements. This process continues, with the star creating progressively heavier elements.

3. Iron is one of the heaviest elements that a star can produce through nuclear fusion. When a star starts producing iron, it signals the end of the star's life. This is because the fusion of iron does not release energy, but instead requires energy.

4. Therefore, when a star has exhausted its fuel and dies, it leaves behind a core rich in iron. This is why iron is very abundant in the inner core of a dead star.

So, the correct answer to your question would be: "It is due to the input of energy upon formation since energy of the star is already used up."