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I just moved to Buffalo for school this fall and I was wondering what are some good attractions and fun things to do in the area.

So I'm doing this biology homework, but I don't know which one of these doesn't meet the requirements. The question is:

Intraspecific exploitative competition applies to all of these except

A) bluebirds inhabiting a limited number of nestboxes

B) chipmunks gathering acorns in fall

C) Bighorn sheep sparring over a female

D) Two species of barnacles inhabiting rocks above and below the low tide line

Now,I know it isn't A or B. But C seems like it wouldn't work because it's interference competition not exploitative, and D doesn't seem like it would fit because it's between two species and would therefore be interspecific not intraspecific? Any help would be most appreciated!

I just bought a pair of ear force p21's, and they make an echo of everything. On menus it makes a double click sound instead of single, which isn't too bad, but when it comes to gunfire, it's absolutely awful. Turtle Beach's support forums are down right now so I can't search them for anyone else having this problem. Anyone know a fix for this?

I've been told that if I get my lip pierced, I would have to wait 2 weeks or so for it to heal before I could wear a clear retainer in it. This is problematic because during that 2 weeks I'd still be working and I can't wear a noticeable piercing to work. Is there any way around this?

Also, how noticeable would you say a clear retainer is in the lip? If there's something other than a clear retainer that hides it better, feel free to let me know.