When a vendor supplies news papers from house to house and across the streets, the element of marketing mix involved is?

The element of marketing mix involved in the scenario you described is "place." This is because the vendor is focused on the distribution and delivery of the newspapers to the intended audience, which involves choosing the right locations and routes to reach the maximum number of customers. In marketing, "place" refers to the distribution channels and methods used to get a product or service to the customers who need it. In this case, the vendor is delivering newspapers directly to people's homes and across the streets, which is a specific distribution strategy designed to make the product easily accessible to potential buyers. The vendor may choose certain locations based on factors such as population density, customer demand, and accessibility. While other elements of the marketing mix, such as the product (newspapers), price, and promotion, may also play a role in this scenario, the primary focus is on getting the product to the customer's doorstep, which falls under the "place" element of the marketing mix.