Question

Ideal location for fishing fields -

1. rugged coasts, shallow seas, hot climate, growth of planktons.
2. shallow seas, confluence of warm and cold ocean currents, growth of planktons, cold climate.
3. continental shelf, growth of planktons, good skill of fishing, warm climate.
4. continental shell, broken coasts, growth of planktons, warm climate.

Answer 1

Shallow seas, confluence of warm and cold ocean currents, growth of planktons, cold climate.

Explanation:

Rich fishing grounds develop where shallow seas/continental-shelf waters and the meeting of warm and cold currents produce abundant plankton (food for fish); cold temperate conditions also help (preservation and productivity).