According to theories concerning the origin of life, the atom shown is a likely choice for the basic element of all livings things because it

Responses
A is small and unstable.is small and unstable.
B is relatively stable and can form four covalent bonds.is relatively stable and can form four covalent bonds.
C forms four ionic bonds with other elements and itself.forms four ionic bonds with other elements and itself.
D is large and takes up enough space to fill the structure of a cell.is large and takes up enough space to fill the structure of a cell.

B is relatively stable and can form four covalent bonds.