The Narrow-Sense Heritability (H²)for Several Traits in Domesticated Cattle Follow

Essay

The narrow-sense heritability (h²)for several traits in domesticated cattle follow:
$$\begin{array} { l l l } \text { Trait } &{ h ^ { 2 } } \\\hline \text { Percent protein in milk } & 0.54 & \\\text { Feed efficiency } & 0.34 \\\text { Milk yield } & 0.30 & \\\text { Calving interval } & 0.01 &\end{array}$$
a)Which of these traits would be most responsive to artificial selection?
b)Which would be least responsive?