Question

please answer the question​

Answer 1

The fishes mentioned are grouped on the basis of their habitat.

Explanation:

Fishes can be divided into two categories based on their habitat

1. Saltwater fish

2. Freshwater fish.

Saltwater fish: These fishes are accustomed to marine conditions like - in sea or oceans. These fishes have more fat because they do not have to work to float, the high salt concentration of the sea keeps them floating.

Example: Mackerel, sardine and tuna, mentioned in group 1.

Freshwater fish: These fishes are found in rivers, lakes and ponds. These fishes have a low concentration of fats as they have to constantly work to keep floating.

Example: Murrel, katrana and katla, mentioned in group 2.