<span>A half-life of a radioactive substance is the amount of time needed for one hald of the nuclie in a sample to decay into a stable isotope.Many protons and neutrons disturb the balance of binding energy from a strong nuclear forces resulting for the nucleus to be unstable. To be in a balance state, the unstable nucleus will give off a proton or neutron through radioactive decay.</span>
Answer:
The answer is B
Explanation:
The exoskeleton of the shrimp helps protects the internal organs of the animal.
Because it is the main site for digestion. food is totally digested and absorbed in small intestine so it is long.
