Archaeological Excavations:

• Excavations at Chanhudaro have revealed a significant concentration of craft-related structures and evidence.
• Artifacts such as beads, pottery, and tools associated with craft activities have been discovered in abundance.

Crafting Workshops:

• The layout of Chanhudaro suggests the presence of specialized areas or workshops for various crafts.
• Specific structures, possibly related to bead-making and other craft activities, have been identified.

Absence of Citadel or Large Residential Complexes:

• Unlike some other Harappan sites like Harappa and Mohenjodaro, Chanhudaro lacks a well-defined citadel or large residential complexes.
• The absence of these features indicates a more specialized function, possibly focused on craft production.

Craft Specialization:

• The discovery of specialized craft items and evidence of craft specialization points to the significance of Chanhudaro as a center for craft production within the Harappan civilization.

So, the correct option is [4].