Typically, pga sockets give better contact than lga sockets.

False

LGA  sockets give better contact than PGA sockets. 

PGA sockets has small delicate pins in the processor which were easily bent while LGA sockets have blunt protruding pins that connect with pads giving a better contact to the bottom of the processor. 

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.