The many rows of sharp, jagged teeth on some sharks is an example of an for catching food

The rows of teeth that sharks have are referred to as an adaptation. Adaptations are characteristics that organisms acquire over time in order to facilitate their survival in their environment. Another example of adaptation which is found in humans is the variance in skin color. A darker skin color prevents damage to the skin in hotter environments.

4+2=-2. 1+2=3. y=-2/3x+b. 2=4/3+b. 2/3=b. the answer is y= -2/3x+2/3

I’d say letter a..