ticks feeding on a dog bees transporting pollen from flowers pilotfish swimming under sharks birds eating the insects from the back of a hippopotamus
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following symbiotic relationships is considered parasitic?
Possibilities:
- ticks feeding on a dog
- bees transporting pollen from flowers
- pilotfish swimming under sharks
- birds eating the insects from the back of a hippopotamus

ticks feeding on a dog