Nitrogen is essential to life a. it is needed for building the proteins needed for cells. b. it is the molecule around which all the molecules of life are built. c. it is needed for making carbohydrates and lipids. d. it is the most common element.

Hey there!

The correct answer to your question is option B.

Nitrogen is essential to life because it is the molecule around which all the molecules of life are built, meaning it is the molecule that is most needed and is one of the most important ones.

Hope this helps you.
Have a great day!

They formed the oceans.  as they melted water was formed and the water made the oceans