Transmission electron microscopes are best for viewing microorganisms in pond water
internal organs of a mouse
internal structures of a cell
surface features of a specimen

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

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.

i would think a oil tanker that has leaked in a bay