Apart of a(n) organism can become diseased, the part can be removed, and the organism can continue to live.

A part of an organism can indeed become diseased. This part can then be removed and the organism will continue to live. When the diseased part is removed, we can ensure that the organism will continue to do well and survive which could perhaps in another case be brought into question. 

Ok, before buying a burger. think of you diet and calories. how many calories are you suppose to eat a day. and look at how much fat, calories, salt is in it. if it is ok to you, then buy it. but if you think that it's to much fat and salt for you. don't buy !

Primary effectit is the most accurate.