Opium is a plant product that is obtained from dried latex. Latex is a milky substance that is secreted by certain plants, such as the opium poppy. To obtain opium, the plant`s seed pods are scored or incised, allowing the latex to ooze out. This latex is then collected and dried, resulting in the formation of opium.

It is important to note that opium is not obtained from dried leaves, roots, or stem bark, as mentioned in the other options. The dried latex specifically contains the alkaloids, such as morphine and codeine, which give opium its psychoactive properties. Therefore, option 2 is the correct answer.