Question

Animals that lives only in water and also reproduces in water is
A. Frog
B. Crocodile
C. Turtle
D. Fish

Answer 1

Hint: Habitat is the type of natural environment in which a particular species of organism lives. A habitat is those places where the species can find food, shelter, protection, and mates for reproduction. It is characterized by two features:
1. Physical features
2. Biological features.

Step by step answer:Habitat is defined as the natural environment of an organism. It is the type of place in which it is natural for it to live and grow. It is similar to the biotope which means an area of uniform environment condition associated with a particular community of animals and plants.
-Frog is an amphibian that is famous for its variety of features like:
1. Jumping Abilities
2. Bulging eyes
3. Protruding sound
4. Anteriorly attached tongue
5. Stout body
Though frogs are amphibians, they can live on land as well as in the water.
-Crocodile: Crocodiles are semi-aquatic and tend to concrete in freshwaters such as rivers, lakes, wetlands, and saltwater. They are carnivorous animals because they feed mostly on vertebrates such as fish, reptiles, birds, and mammals.
-Turtle: Freshwater turtles live in ponds and lakes, and they climb out of the water onto logs or rocks to bask in the warm sun.
-Fish: Fish lives only in water because the gills of the fish which act as a respiratory organ, can take oxygen only from water and not from the air. Therefore, it is necessary for them to live in water. Fertilization is external in most fish species. Male and female species release a large number of eggs and sperm are simultaneously into the water. This process of egg release is termed spawning.
 So, the correct option is option D. Fish.

Note: Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments from high mountain streams to the abyssal and even hadal depths of the deepest oceans although no species has yet been documented in the deepest 25% of the ocean.