Final answer:
Among the given options, RSA is the asymmetric algorithm. It uses a pair of keys, one for encryption (public key) and one for decryption (private key), which are different from each other.
Step-by-step explanation:
The question you've asked is related to cryptography, which is a part of the Computers and Technology subject. In cryptography, asymmetric algorithms are cryptographic algorithms that use pairs of keys: one for encryption (public key) and one for decryption (private key). Of the options you've provided, RSA is an asymmetric algorithm. AES (Advanced Encryption Standard) and Blowfish are examples of symmetric key algorithms, which means they use the same key for both encryption and decryption. SHA-1 (Secure Hash Algorithm 1) is neither symmetric nor asymmetric; it is a cryptographic hash function. Therefore, the correct answer to your question is RSA.