I think the answer is either B or C, hope this helps! Sorry if it doesn't!
Answer:
Explanation:
The animals are used for examining and determining the effect of a particular new drug for the treatment of the diseases and disorders before they are examined over humans. This practice is called as clinical trial.
The ethical issue associated with given type of testing is that animals have right to live and survive. They should not be subjected to the treatment where they experience harm or even death.
I believe it is dissecting
If this is what you are looking for : SO4 is sulfate's formula. We can say Sulphur and Oxygen is the answer.
The process of spontaneous passive transport of molecules or ions across a cells membrane
