$\begin{array}{1 1} \text{a)The parents of the egg will break it open} \\ \text{
b)The mother of the egg will incubate and provide warmth so that it can hatch} \\ \text{
c)Other birds will break it open}
\\
\text{
d)They will put the eggs in water so that it will hatch}
\end{array}$
