Which process allows a bacterium to take DNA from its environment and add it to its own genome?

b transformation

Explanation:

In transformation, a bacterium takes up a piece of DNA floating in its environment. In transduction, DNA is accidentally moved from one bacterium to another by a virus. In conjugation, DNA is transferred between bacteria through a tube between cells.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.