Mallard ducks secrete preen oil from a gland above their tail feathers. Mallards use their beaks to collect preen oil and work it into their feathers. This gives their feathers a waterproof quality and prevents water from collecting and soaking into their feathers. To which group of organic molecules do oils belong?

nucleic acid

lipid

protein

carbohydrate

Melissa lives in a town called greendale. she discovers that when she lights a match and holds it near her kitchen faucet, the little flame grows into a larger fire. melissa is surprised because she thought the water would extinguish the flame rather than ignite it further. her mother tells her that the water might be contaminated with dissolved methane, a primary component in natural gas. melissa investigates the matter and finds that cases of methane contamination started shortly after a company began fracking for natural gas in the area. based on this information, which three statements are plausible consequences of fracking in greendale?

Which description provides the best objective summary of the article in the passage?

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?