Concept:A fruit type depends on how the ovary or ovaries of a flower develop after fertilisation.Explanation:A single flower may have one carpel or many carpels. If the carpels are free, each ovary can develop into a small fruitlets. All these fruitlets merge to form one fruit on a common receptacle. When a fruit develops from several free carpels of a single flower, it is called an aggregate fruit. Examples include strawberry and raspberry.Answer:B. aggregate fruit.