Which object is used to focus light in a light microscope?

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

Why do mountaineers become breathless as they reach high altitudes