What is a common feature of marijuana?

Marijuana is primarily known for its distinctive appearance, which is that of a green leafy substance. This characteristic comes from the plant's leaves and flowers, which are typically rich in cannabinoids, the active compounds responsible for its psychoactive effects. The green color results from the chlorophyll present in the plant material, giving it a fresh and natural appearance.

While marijuana can occasionally take on forms that include powder or concentrates, the most common and recognizable form is the leafy, dried herb that users often smoke or vaporize. This form contains the various compounds in their most natural state, contributing to its well-documented effects and uses.

The other options, such as light-brown powder, crystallized nuggets, and liquid form, do exist but are not representative of the most typical and widely recognized form of marijuana. Crystallized forms may refer to concentrates or specific derivatives like THC crystals, but these are not the common feature of marijuana as it is typically encountered. Thus, the description as a green leafy substance is the most accurate and general representation of marijuana itself.