R
The number after two
What is three
The circular decorations that are put on front doors
What is a wreathe?
The process of inhaling and exhaling
What is breathing?
The stuff that keeps plants in the dirt
What is roots?
You need to train for months in order to run in this type of race
What is a marathon?
What is rival?
The first digit on your hand; the only opposable finger you have
What is thumb?
The organ that we use to process our thoughts
What is brain?
Your head is full of these (the process of using one's mind to consider or reason about something)
What is thoughts/thinking?
What is threats