Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

For the first answer it is C.
Jewish people follow a Diet called Kosher. It mainly consists of no pork but has other factors as well
The second answer is C.
I think it's one third, but I'm not entirely sure.
Hope I helped to some extent!
The physician will have to do make-ups for patients he/she missed, as well as new appointments.
All of these can have a big effect on our food choices.
Let's take product packaging for example - if you're walking down a supermarket, you're more likely to look at and buy a product that looks appealing to you from the moment you see it, not even looking at what that product is or how much it costs.
Product pricing obviously affects your choice as well. If you have the same type of rice from two different producers, you're more likely to buy the one that is cheaper.
Cultural background - this affects perhaps what food we eat. However, given the diversity and possibility, cultural background will have less and less influence. People from an Asian heritage perhaps tend to eat more rice per househould, compared to people from an European heritage. So this may affect how often one would opt for rice or something else instead.