The answer is C, West Nile virus!
D) Letter Y represents runoff
Answer: a cell membrane
Explanation: But remember that bacteria do have their DNA inside their protein envelope. They don’t have a nucleus, but they do have DNA making them also have the ability to reproduce.
Answer:
1. air mass -> large body of air with uniform temperature and humidity
2. cyclone -> a severe storm
3. front -> where two different air masses meet
4. source region -> area over which an air mass forms