Organisms have adaptations which allow them to survive in harsh environments. Select all the adaptations that would assist penguins in surviving in Antarctica.
(The picture is the answers)

of those who start drinking before they're 15 will develop alcohol dependence

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

carbon

explanation:

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.