Answer: Parasitism.
Step-by-step explanation:
Parasitism is a relationship in which one organism (parasite) derives a benefit from another organism (host). This type of relationship is known as a symbiotic relationship. The host is usually harmed by the actions of the parasite, who after absorbing all the nutrients from the host searches for a new host.
In this case, the Mistletoe is the parasite that feeds on the shrubs, this relationship causes damage to the shrubs due to the symbiotic relationship they have.
I hope this information can help you.