Can you guys tell me these all animals mode of nutrition Pisces-
Catfish, Shark, Fish, Seahorse, Electric eel
Amphibia-
Wall lizard, Salamander, Flying lizard, Hippopotamus, Frog
Reptilia-
Snake, Alligator, Crocodile, Tortoise
Aves-
Penguin, Sparrow, Eagle, Kingfisher, ostrich
Mammalia-
Human, Cat, Dog, Whale, Dolphin

If you are the first to answer I will mark you as braininess but the answer must be correct

   As per my full understanding,

There are two main modes of nutrition:

    Autotrophic – Plants exhibit autotrophic nutrition and are called primary producers. Plants synthesis their food by using light, carbon dioxide and water.

   Heterotrophic – Both animals and human beings are called heterotrophs, as they depend on plants for their food.

              WHEREBY: TERMS IN THIS TWO SETS ARE:

   Chemohetrotroph. Gets energy from chemicals and carbon from other sources.

   Photohetrotroph. Gets energy from light and carbon from other sources.

   Chemoautotroph. Gets energy from chemicals and produces its own carbon.

   Photoautotroph. Gets energy from light and produces its own carbon.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.