Answer:
cryptography
Explanation:
cryptography
In computer science, cryptography refers to secure information and communication techniques derived from mathematical concepts and a set of rule-based calculations called algorithms, to transform messages in ways that are hard to decipher
You should probably slow down, make sure no trains are coming (and listen for any train sounds!) before proceeding to cross and go about your way :)
You need to list the options.
Answer:
10.......................
