High Definition Television
Answer:
Tier 1 support
Explanation:
Of the given options, tier 1 support technical group is the least experienced group. This group of technicians is also referred to as level 1 technical group.
The tier 1 or level support are made up of junior technician, and they have few technical understandings.
Their roles include email response and basic troubleshooting, attending to phone calls, among others.
When a problem cannot be solved by tier 1 support technicians, they pass the problem to tier 2 support technicians,
Explanation:
It's placed near the door. When a visitor presses the button, the bell rings inside alerting you that someone is at the door.
human center because we describe stuff by what we see and obserevs