answer:1. Walking 2. Public transportation 3. Electric scooter 4. Skateboard

answer:Compare prices from different websites, use coupon codes and promotions, sign up for retailer newsletters to receive exclusive discounts, and consider buying non-branded or generic products.

answer:The clustering process is a technique used in data analysis and machine learning to group related data points or observations together based on their similarities or differences. The process involves finding optimal cluster centers, assigning data points to the nearest cluster center, and iterating until the clusters become stable. Clustering is used in various applications, including image and speech recognition, customer segmentation, and anomaly detection.

answer:India's population in 2020 was approximately 1.38 billion.