Sedimentary rocks are the product of 1) weathering of preexisting rocks, 2) transport of the weathering products, 3) deposition of the material, followed by 4) compaction, and 5) cementation of the sediment to form a rock. The latter two steps are called lithification.
Protect the tree from animals, bugs, or other predators.
They both act like filters. The coffee filter makes sure that coffee doesn't go in the drink and the kidney makes sure solids don't pass by.
Hot: drought
Cold; dead animals
rainy: flood
cloudy: thunderstorms
mostly natural disasters: everythings dead