its gills
American robins have many features to survive like their beaks to eat and wings to fly. They survive using those features just like humans survive.
yes it helps because they have there own skill to survive its in there gens
in damp dark places eg. under rocks and big stones
yes the part on it head....the hammer on its head is what helps it survive and kill its prey!D
You really need to learn how to use the internet.
It eats soild which helps in the oxygen cycle.
the eye helps it see very far to see prey or predaders.
Two features of penguins that help them to survive would be their thick skin and waterproof coat. Also their ability to slide on their bellies.
they can trample a person to death in no time flat, they use their trunk and their tusks to defend themselves.
it helps them survive by eating ther pray
Mammals usaully survive by instinct
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