27 an example of a food which particularly benefits from the addition of spices. [blank_start]D[blank_end]
28 a range of methods for making food safer to eat. [blank_start]I[blank_end]
29 a comparison between countries with different climate types. [blank_start]F[blank_end]
30 an explanation of how people first learned to select appropriate spices. [blank_start]G[blank_end]
31 a method of enhancing the effectiveness of individual spices. [blank_start]D[blank_end]
32 the relative effectiveness of certain spices against harmful organisms. [blank_start]C[blank_end]
33 the possible origins of a dislike for unspiced foods. [blank_start]H[blank_end]