Cow Birds Often Land on the Backs of Cows and Pick

Multiple Choice

Cow birds often land on the backs of cows and pick off ticks and other creatures that feed on the cow. Thus, the birds benefit the cow by removing harmful or irritating bugs, and the cow benefits the bird by providing a food source location. In this situation, the relationship between the ticks and the cow is ________, and that between the cow and the bird is ________.

A) symbiotic; parasitic
B) parasitic; symbiotic
C) symbiotic; mutualistic
D) mutualistic; symbiotic