It should be a food web, because there are various producers and consumers, and the bears and humans eat each other
Most likely clay, silt and sand are to be found in samples of rocks.
The answer is commensalism because the hermit crab doesn’t cause harm
Diffusion is a passive movement. The correct answer is b
An area that was covered by a glacier
Primary succession is a method of bringing about fertility in infertile land that can not be cultivated. This method usually involves plant species known as "pioneer species", that do not rely heavily on soil nutrients but add nutrients to the soil. The land under the glacier is likely to be void of nutrients and infertile, so primary succession will be needed there the most.
