Answer:
D
Explanation:
An infection is when something invades your body, therefore, you are infected with micro-organisms making it D.
Answer:
the candle will go out
Explanation:
since without oxygen it can't burn in a closed environment the oxygen will either be to low or not even present
The answer is amino acid.
The number of covalent bond an element can form depends on the number of electrons it has in its outermost shell (valence electrons). Carbon has four valence electrons, therefore, it can form maximum of four covalent bonds in an organic compound.