The correct answer is: A. devices
Cloud services providers host video and data for end users on devices such as servers, storage, and networking equipment. These devices are typically located in data centers that are designed to provide a high level of availability and security.
Option B, memory, is not the correct answer because memory is not a device. Memory is a component of a computer that stores data.
Option C, security system, is not the correct answer because a security system is not a device. A security system is a system that is designed to protect a computer or network from unauthorized access.
Option D, objects, is not the correct answer because objects are not devices. Objects are entities that can be represented in a computer system.