An affix is what is added to be beginning, or end, of your root word.
-Endo, means within. However Endocrin, is a gland within your body, which secretes liquid.
-Ology means the study of something.
The answer is the 4th one
Well, using my limited knowledge, "cleaving" means to chop, break in half, split, etc. Twain means twice. So, perhaps it's like "you've broke my heart in half", something along those lines? hopefully this helps you.
Answer:
are
Explanation:
I think it is are because it makes sence and because if we add a word it would be are