The answer is D.
Factor production that could be changed during particular period is called Variable Factor of Productions.
Basically, factor of productions is divided to fixed and variable factor.
FIxed factors are the one that will always stay the same no matter how many products you made. For example electricity cost, building rent, etc
The variable factors differ depend on how product you produce, such as raw material.
Tourism is travel for pleasure or business. it can be the business of operating tours, accommodating, and attracting.
Answer:
The container analogy is too static.
Explanation:
The WM or the Working memory may be defined as a cognitive system with some limited capacity which can hold information for a short period of time or temporarily. Working memory is very important for reasoning and also the guidance of the decision-making as well as behavior.
In the cognitive system, the recent effect is always associated with the working memory.
Working memory is always associated with the storage container which can store memories for short time. But this analogy is very much static as the working memory can more capable than simply the short term storage.
Your answer is most likely C. :) Glad I could help!!