The answer is d) organic chemistry
Answer:
A-Antibodies protect us from getting the exact same virus twice
Explanation:
When tiny ice crystals in clouds stick together to form snowflakes, the result is snow. If enough crystals form a clump, they'll become heavy enough to fall to the ground. When temperatures are cold and moisture in the form of tiny ice crystals exists in the atmosphere, snow forms.
I hope this help but the metalloids is gruop five if that what your asking if not i will answer the other question for you
