They have less-runny lava, meaning that it doesn't travel as far before cooling, meaning that the layers build up more steeply, but don't go out as far. You also get layers of ash on the composite volcano to help build it up too
Answer:
In cities due to high population and presence of more services.
Explanation:
Most shopping malls are present on that location where human population is higher such as cities and towns because people are the customers who bought the products present in these malls. The owners of malls built malls in the cities due to the presence of high population of peoples in order to sale more products to the people and earn high profit. these malls also built in cities due to the presence of services such as electricity and water etc.