Normally a glossary would be in the back of a book. Think of a textbook, there's normally a glossary in the back of the book.
Answer:
How about these?
... a challenging terrain
... logistical problems
... navigational challenges
Explanation:
The aorta is D,<u> the largest artery carrying oxygenated blood from the heart to the body! </u>
:)
1. Get a well paid job
2. Lose virginity
3. Travel
4. I kinda wanna try threesome with the boys
5. Probably die in peace