Consider the following statements:

1. Tides are of great help in navigation and fishing.
2. High tide enables big ships to enter or leave the harbour safely.
3. Tide prevents siltation in the harbours.
4. Kandla and Diamond Harbour are tidal ports.

Which of these statements are correct?

1. I and IV
2. II, III and IV
3. I, II and III
4. I, II, III and IV

Explanation

All statements are correct

• Tides are regular and predictable, enabling navigators and fishermen to plan their activities efficiently; tidal currents also assist movement along coasts and estuaries.
• High tides elevate water levels, allowing large vessels to cross shallow harbour bars and enter or leave ports safely. The continuous inflow and outflow of tidal waters helps flush out sediments, thereby reducing siltation in estuarine harbours and minimizing the need for dredging.
• Moreover, Kandla (Deendayal) and Diamond Harbour are tidal ports.

Answer: (d) I, II, III and IV