Answer:
The bicycle is a tremendously efficient means of transportation. In fact cycling is more efficient than any other method of travel--including walking! The one billion bicycles in the world are a testament to its effectiveness
Explanation:
Virtual Assistants can be useful. Blind people can use them to be informed, browse the web, and learn new facts. They can make tasks quicker too. They can control things like your heater or air conditioner. But if one were to malfunction, it could take lives.
Answer:
Polymorphism means that a variable of supertype can refer to a subtype object.
Explanation:
For example, in Python programming language, a function that accepts an iterable object uses the concept of polymorphism because that function can accept strings, lists, tuples as arguments.
