Answer:
I think the answer would be lichens, because lichens are formed during primary succession as a pioneer species. During secondary succession, grasses are usually the pioneer species.
Answer: If it comes closer, make yourself look larger and make lots of noise. If it still continues to come closer then spray (or throw) water at it. A raccoon that is too aggressive or too tame may be sick or injured.
The differences between osmosis and diffusion it that diffusion refers to the movement of any chemical from one place to another, whereas osmosis exclusively refers to the movement of water across the semipermeable membrane. (cell membrane)
When the ocean´s conditions change over a period of time everything in it also changes, they have to adapt to the changes.