Concept:
Wood used in sculpture is broadly classified into softwood and hardwood.
• Softwoods are obtained from coniferous (gymnosperm) trees such as pine, fir, cedar, and spruce. They are generally lighter, easier to carve, and widely used for practice and decorative sculptures.
• Hardwoods are obtained from deciduous (angiosperm) trees such as oak, teak, and walnut. They are denser, stronger, and suitable for durable and finely detailed carvings.
Step 1: Identify the coniferous (softwood) among the given options.
Among the given woods,
\[
\boxed{\text{Pine} \Longrightarrow \text{Softwood (Coniferous)}}
\]
Step 2: Examine the given options.
• Oak -- Hardwood.
• Pine -- Correct; a coniferous softwood widely used for carving.
• Teak -- Hardwood.
• Walnut -- Hardwood.
Hence,
\[
\boxed{\text{(B) Pine}}
\]