Questions: Bitcoin, Ethereum, and LiteCoin all use blockchain algorithms to control quantity and verify the validity of transactions. They are referred to as - fakecoins - cryptocurrency - virtual cash - computer money

The answer is the second one: cryptocurrency.

Explanation for each option:

1. Fakecoins: This term is not commonly used to describe Bitcoin, Ethereum, or Litecoin. These are legitimate digital currencies, not fake ones.

2. Cryptocurrency: This is the correct term. Bitcoin, Ethereum, and Litecoin are all types of cryptocurrencies. They use blockchain technology to manage and verify transactions.

3. Virtual cash: While this term could loosely describe digital currencies, it is not the specific term used for Bitcoin, Ethereum, and Litecoin. "Cryptocurrency" is the more accurate term.

4. Computer money: This is not a standard term used in the context of digital currencies. It is too vague and not widely recognized.

In summary, Bitcoin, Ethereum, and Litecoin are all referred to as cryptocurrencies because they use cryptographic techniques to secure transactions and control the creation of new units.