Questions

The foods that are good source of fat and incredibly healthy to the body ar fatty fish, eggs, nuts, cheese, avocados, dark chocolates, etc...

Opportunity cost is the cost of other alternative choices for making your interested choice of work. Oppurtunity cost is also called as alternative cost.

For example on a holiday, you have two choices to do, either you can go to movie or a function. And if you chose to go to moavie, the oppurtunity cost of going to movie is the value that would have gotten if you had gone to function.

The law of increasing opportunity costs states that as you increase production of one good, the opportunity cost to produce an additional good will increase.

Anything which is circular shape has no beginning, no middle or no end. 

The food like donuts have no beginning, end or middle. 

No improvement required. Grant means to permit as a favor. As the interview will be a favor the use of Grant is correct.

The first two steps in the lithification process are Compaction and Cementation.