The relationship between ticks feeding on a deer exemplifies parasitism (Option B).
In parasitism, one organism, the parasite (ticks), benefits by obtaining nutrients from another organism, the host (deer), which is harmed in the process.
Ticks feed on the deer's blood, potentially causing harm or discomfort to the deer. Unlike mutualism, where both parties benefit, or commensalism, where one benefits without harming the other, parasitism involves an unequal relationship with one organism benefiting at the expense of the other.
Predation (Option D) and competition (Option E) typically involve more direct interactions rather than a symbiotic relationship.
Full Question:
Although part of your question is missing, you might be referring to this full question:
Exemplified by ticks feeding on a deer.
A. Commensalism
B. Parasitism
C. Mutualism
D. Predation
E. Competition