Ecology question above with a picture

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

During convection, less dense fluid rises and denser fluid sinks.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?