Question about human populations and key food sources...?

Question

Question:

Most humans rely on just a few of the world's animal and plant species for food because only because a few

A) are edible

B) are available

C) have been discovered

D) food types are what we are accustomed to eating

E) All of these are true

Just to add, I have ruled out A and E. A because there are thousands of edible plants in the world, E because if A's out, so is E. I have an idea of what the answer may be, but I can't find it in my text, the slides, or the notes. Thanks to anyone who can help.

Answer 1

Answer E

Letter A: No one knows all the different types of plants that are edible. I doubt anone is willing to find out and try every single plant.  As for animals (and in this case, plants) some are endangered. they aren't allowed to be killed or eaten, even though are edible.

Letter B: As for animals (and in this case, plants) some are endangered. they aren't allowed to be killed or eaten, even though are edible.

Letter C: According to most surveys, we have only found a tiny percentage of all the living organanisms on earth.  Around 10%.  We have no idea whether the rest of the unknown plants and animals are edible.

Letter D: People are hesitant to eat plants or animals that they have never tried. Or even foods that  they've never had before.  If someone had a choice between eating food that they wre used to and then a strange, new food, they would instantly pick the food that they have eaten before- because they are accustomed to it already and know that it's safe.

Letter E are all of these.

Answer 2

I'd go for D.

My professor had a foreign student (I won't say which country) who was shocked that my prof was going to remove the weeds in her lawn.

Looking at the weeds, the grad student quietly said that where he came from, they were all edible.

Answer 3

A) excludes the inedible, but does not say that every edible plant and animal is included.

I go for E).