Which of the following is a way to use Amazon EC2 Auto Scaling groups to scale capacity in the AWS Cloud?

Explanations:

This option describes the primary function of EC2 Auto Scaling groups, which automatically adjusts the number of EC2 instances in response to demand. When traffic increases, more instances can be launched; when traffic decreases, instances can be terminated.

There is no concept of “serverless EC2 instances.” EC2 instances are always server-based. While AWS offers serverless options (like AWS Lambda), this is not related to EC2 Auto Scaling groups.

Scaling the size of EC2 instances up or down is known as vertical scaling, which is not managed by EC2 Auto Scaling groups. Auto Scaling primarily focuses on horizontal scaling (adding or removing instances), not resizing existing ones.

Transferring unused CPU resources between EC2 instances is not a function of Auto Scaling. EC2 instances operate independently, and their resources cannot be shared or transferred dynamically in this manner.