Dependence on drugs means you have a chemical need for a drug. What are the consequences of dependence? Symptoms of withdrawal can occur as the drug wears off.
User believes they need the drug to feel good or function.
Dependence leads to addiction.
All of these.
None of these, there are little consequences to a dependence on drugs.

All of these

Explanation:

I would argue that all of these are the case for dependance. Withdrawl symptoms occur after prolonged time without the drug. Users of drugs do feel they need the drug to feel good/function. And dependence does lead to addiction.

answer; all of the above;

a mother eats twice as much to support her growing fetus

limiting sugar intake in a mother with gestational diabetes, switching from diving to swimming.   depending on whether the patient is normal weight, over weight or gain will differ depending on that.