B) What is Curie temperature ?

Curie temperature is a temperature at which certain magnetic materials undergo a sharp change in their magnetic properties. In the case of rocks and minerals, remanent magnetism appears below the Curie point—about 570 °C (1,060 °F) for the common magnetic mineral magnetite.

( the temperature is about 570 C if you couldn’t understand what the paragraph meant and if you were looking for the number )

Those are all examples of edible fish. so your answer is numbers 1 and 3.