Answer: AWS Cost Explorer

AWS Cost Explorer is the correct service for visualizing, understanding, and managing AWS spending and usage over time. It provides: - **Interactive dashboards** to visualize cost and usage data - **Time-based analysis** to track spending patterns - **Cost forecasting** to predict future expenses - **Resource-level granularity** to identify specific cost drivers - **Customizable reports** for different business needs **Why other options are incorrect:** - **AWS Organizations**: Manages multiple AWS accounts but doesn't focus on cost visualization - **AWS Pricing Calculator**: Estimates costs before deployment but doesn't track actual spending - **AWS Service Catalog**: Manages approved IT services but doesn't provide cost analysis features

Author: Ritesh Yadav