What are the rarest bacteria?

Plz ! ive been stuck on this forever

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation

What is it called when lava when it erupts from the surface through volcanoes.