Answer:
This model can be called a parasitic relationship
Step-by-step explanation:
A parasitic relationship is a form of relationship/interaction between two organisms in which one organism (called parasite) lives at the expense of the other organism (called host); causing harm or death to the host.
A hornworm caterpillar feeds on the upper part of tomato plant leaves, causing harm to the plant in the process. Hence, the tomato plant is the host while the hornworm caterpillar is the parasite.