Answer:
A. a clear central message.
When creating a presentation on basically anything, there should always be a clear central message. The purpose of most presentations are to give information on what the presenter would like to convey to the audience members. Without a clear central message, the audience members would be lost and the presentations purpose will not be fulfilled.
<span>In the 219th meeting of the American
Astronomical Society, it was said that "Earth" is the plant that's
borders were recognizable from space.
</span>Former NASA astronaut John Grunsfeld said that these are visible in the
form of environmental differences.
<span>He busted a myth also that The Great
Wall of China is visible from space, he denied it.</span>
It depends on how far you travel
Answer:
C. Denial of Service
Explanation:
Denial of service error occurs when the legitimate users are unable to access the system. They are then unable to access the information contained in the system. This can also be a cyber attack on the system in which user are stopped from accessing their personal and important information and then ransom is claimed to retrieve the attack. In such case system resources and information are temporarily unavailable to the users which disrupts the services.