One of the primary benefits of using AWS Cloud is the ability to leverage economies of scale. Because AWS operates at a massive scale, it can offer lower variable costs than what most individual organizations can achieve on their own. AWS passes these savings to customers as they consume more services. The answer indicating that AWS ‘reduces costs through economies of scale by sharing infrastructure costs across numerous users’ is correct because it captures this concept of spreading out infrastructure costs and the associated savings. The description also aligns with the concept of variable costs, which decreases as the volume of services used increases. The other answers might seem plausible but do not specifically address the core benefit of economies of scale provided by AWS.