Answer:
Well, not necessarily
Explanation:
Yea it's a good invention but we don't really need it it's just a time consumer.
Sorry if this is not what you needed sorry.
I think that they try to portray their product as the best, coolest thing, and target a specific age group.
Answer:
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Explanation:
