Answer:
<u><em>The correct option is A) smoke signals</em></u>
Explanation:
In the past, smoke signals were a common method for effective and visual communication over long distances. It uses puffs of smoke to generate a message.
The method of smoke signals simply implied that a fire is created and then covered by a blanket. When the cover was released, smoke would be created which could be seen over long distances.
Different fuels were used for making smokes and changes in the colour and density of smoke created different messages.
The key ideas of demands are basically a universal pedigree to create a business. It generates exponential form of revenue, when there is a demand. The purpose of the section is simple under human conciseness there are requirement which humans perceive, I wish this could be easier to accomplish and products are created basis on this demands. example Amazon doorstep delivery, Bluetooth in car for calls to attend.
Explanation:
- Our demands are infinite basic necessity is food,shelter and clothes.
- Our demands are how to commercialized or create a trend for people.
- Demands were like restaurants,brands, fitness, automobiles and etc.
- Microsoft created demand for PCs and office.
- Airplanes were created it saves more time then others forms of transport.
- Cash in hand was a requirement those time credit card became a demand.
- Restaurants became in demand and people love to eat food.
- Today's time data became a demand which is sold for mobile numbers.
Answer:
A
Explanation:
because the spelling of believe is incorrect
