Kandla : Paradeep : Haldia — Determine the shared infrastructural category that best describes these Indian locations and choose the most accurate label.

Introduction / Context:
Indian geography and infrastructure appear frequently in reasoning sets. Kandla, Paradeep, and Haldia are names closely associated with maritime trade and logistics. The task is to map these names to the correct infrastructural category and avoid options that either denote natural features or are too vague to be accurate descriptors.

Given Data / Assumptions:

• Kandla is a major port in Gujarat, India.
• Paradeep is a major port in Odisha, India.
• Haldia is a port on the Hooghly River in West Bengal, India.
• We need a single category label that precisely fits all three locations.

Concept / Approach:
Each listed location functions primarily as a port supporting maritime and inland waterway logistics. Seas is a natural water body category, not a facility. Grounds is an imprecise term. Industry is overly broad and does not specifically identify the facility type. Ports names the correct infrastructural category directly and unambiguously.

Step-by-Step Solution:
1) Recognize the role of each location in maritime trade.2) Compare the inclusiveness and precision of the options.3) Select Ports as the exact infrastructural classification.

Verification / Alternative check:
Consider alternative labels like Harbours. While similar, the provided option Ports is standard and fully appropriate. Since all three are established port locations, Ports is correct and precise.

Why Other Options Are Wrong:

• Seas: Natural bodies of water, not man made maritime facilities.
• Grounds: Vague term lacking relevant specificity.
• Industry: Overly broad; ports are infrastructure supporting many industries but are not themselves an industry category.

Common Pitfalls:
Confusing a port with the larger water body or hinterland. The items are facility centric place names integral to trade and shipping, not generic geographic features.

Final Answer:
Ports