Which features of the sun are typical of stars

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

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

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