The best way of doing it without potentially causing harm to yourself, would be "wafting".
Answer:
C) They are part of a community
Explanation:
A community represents the sum total of populations of different species present together in an area or ecosystem. In a community, the organisms of these different species may benefit or harm each other and exhibit little or more interdependence. In the given example, beer, insects, ants, chipmunks represent the organisms of different species that are present together in a habitat. They interact with each other in various ways. For instance, the bear is a predator of insects.
C.Natural Selection would be the answer
I believe this difference in concentration of dissolved Particles from one location to another is called a concentration gradient.
