As you grow older, an injury to your ______________ may take longer to ____________.

1. heel / heel
2. heal / heel
3. heal / heal
4. heel / heal

${\color{Red}{\text{“Heal”}}}$ is to get better in health; to recover from a disease or injury. The ${\color{Green}{\text{“heel”}}}$ is the back part of one’s foot. It is also the back part of socks and stockings worn at the same place.
The major difference between ${\color{Red}{\text{“heal”}}}$ and ${\color{Green}{\text{“heel”}}}$, as well as the best way to remember what each refers to, is that ${\color{Red}{\text{“heal”}}}$ is a ${\color{Blue}{\text{verb}}}$, while ${\color{Green}{\text{“heel”}}}$ is a ${\color{Teal}{\text{noun}}}$.
As you grow older, an injury to your ${\color{Green}{\text{“heel”}}}$ may take longer to ${\color{Red}{\text{“heal”}}}.$
Correct Answer $:\text{D}$