Unexpected means it was something you did not "expect" to happen such as a car crashing into you which means this is wrong.
Unfair is any injury.
Unnecessary means it was never needed and could have been prevented/not done therefore unnecessary is the best term.
Answer:
an intense feeling of deep affection.
Explanation:
RNA is genomes viruses. It caused thousands of death each year. For example Spanish Flu 1918 is the most deadly viruses. Because of deadly viruses that is why scientist have to make new fomulas to control over the flu. Every year, we should have a flu shots. However, there are several viruses have no medication for it, beside anitibiotics, for example, influenza A, B, C or H1 N1 or H3 N2. DNA is genomes of testing. For example, murder case, FBI, Lab, will collect all evidences to find out the killer. |CIS show} they are using DNA.
