1. The main disadvantage of using shells as money, instead of coins, would be a lack of:

a. durability
b. portability
c. uniformity
d. divisibility
I think its B. portability?

I would say a. Shells are portable, but break easily. You could have special exotic shells for high value money. I would see the main problem to be the ease of counterfeiting.

I wud sai it is uniformity b cuz all da shell certainly did nt luk da same so therefore u wud nt no the exactly value for a particular un da values will b all mixted up

To determine the correct answer, let us analyze each option:

a. Durability: Shells, being made from natural materials, have a certain level of durability. However, they may not be as durable as metal coins, which are specifically designed to withstand the wear and tear of frequent use. So, while durability could be considered a disadvantage of using shells as money, it might not be the main one.

b. Portability: Shells are relatively lightweight, but they may not be as convenient to carry around in large quantities compared to smaller, more compact coins. This makes portability a valid concern when using shells as money.

c. Uniformity: Shells come in varying shapes, sizes, and colors, which can make it challenging to establish a standardized and consistent value for each shell. This lack of uniformity could indeed be a disadvantage when using shells as a means of exchange.

d. Divisibility: Shells are generally not easily divisible. Unlike coins, which can be divided into smaller denominations, shells often come in singular units. This lack of divisibility can create difficulties for precise transactions and change-making.

Given the options, it seems that "c. uniformity" and "d. divisibility" could also be disadvantages of using shells as money. However, a stronger argument can be made for "b. portability" as the main disadvantage. Shells might be more cumbersome to carry around and less suitable for large-scale trade when compared to coins. Therefore, it is reasonable to conclude that the correct answer is indeed option B, portability.