The question is asking to choose among the following choices that states the mechanism does Cork cambium use to protect the stem and in the choices, I would say that the answer would be Deposits of water in the cork cambium act as a barrier and protect the stem from water loss, physical damage, and invasion of pathogens.
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The SAFENET form and process was designed for frontline firefighters and endorsed by the National Wildfire Coordinating Group (NWCG) in 2002.AFENET provides another way for frontline firefighters to be heard-to get unsafe situations resolved on the fireline. SAFENET is also a means of capturing important safety-related data for a common data base at the National Interagency Fire Center to help determine long-term trends and problem areas.