Limiting freedom or rights. So, if this is an essay response for which you need to argue one thing, I would choose freedom. If this a racial situation, then you can take the "rights" approach.
Think about. If everyone is allowed to get a $1 from a bucket but I don't allow you to for whatever reason, I'm taking away your freedom or right. You are being oppressed.
I hope this helps.
Answer: Crona Viruse
Explanation: bats carry viruses, so when they are in caves, they are crowded together. While they are all mushed together, they pass on the viruse.