Deletion because it worse then a substitution since your deleting something
Answer:
The answer is B
Explanation:
The exoskeleton of the shrimp helps protects the internal organs of the animal.
Answer:
Halife of C-14 is=14(RAM÷2)
You get=7 but further more let's say after 3 half life as your question stated it may result to decimal something which is impossible (as nucleons never be decimal)
Hence after 3half life it will continue to be 7
Evolution would be the answer you may be looking for.
Answer to your question is D