Concept:
Oviparity is a mode of reproduction in which animals lay eggs.
Step 1: Understand oviparity.
In oviparous animals:
\[
\boxed{\text{Eggs are laid outside the body}}
\]
\[
\boxed{\text{Embryo develops outside maternal body}}
\]
Examples include birds, reptiles, and many fish.
Step 2: Compare options.
• (A) describes viviparity.
• (B) correctly defines oviparity.
• (C) also describes viviparity.
• (D) is incorrect.
Step 3: Final answer.
\[
\boxed{\textbf{Option (B)}}
\]