2. What technology is used to secure cryptocurrencies? A) Blockchain B) Antivirus software C) Social media algorithms D) GPS tracking

## Step 1<br />The question is asking about the technology that is used to secure cryptocurrencies. Cryptocurrencies are digital or virtual currencies that use cryptography for security. <br /><br />## Step 2<br />The technology that is used to secure cryptocurrencies is the Blockchain. The Blockchain is a distributed database that is managed by different participants. It is a chain of blocks, each of which contains a list of transactions. <br /><br />## Step 3<br />The Blockchain technology is used to secure cryptocurrencies because it ensures that the transactions are secure and that the records are unchangeable. This is because once a block is added to the chain, it cannot be altered without altering all subsequent blocks, which requires the alteration of consensus in the network. <br /><br />## Step 4<br />The other options, Antivirus software, Social media algorithms, and GPS tracking, are not used to secure cryptocurrencies. Antivirus software is used to protect computers from viruses and other malware. Social media algorithms are used to personalize the content on social media platforms. GPS tracking is used to track the location of a person or object.