Answer:
Record number
Explanation:
It simply can't be "data type" as there cant be more than one data type in a field. It won't be "primary key field" either as primary keys only set the field as unique. You can test this by changing the primary key to a different field. But for simplicity's sake, I did this experiment for you.
As you can see in the first and second attachments, ID is the primary key, set default by the program.
But when I set Field 8 as the primary key, shown in the third attachment, field 8 doesn't sort, shown in the fourth attachment.
Answer:
3. System Software
Explanation:
An operating system is a special type of system software. It controls and co-ordinates overall of the computer.
<h2><u>Answer:</u></h2>
A seismograph has an overwhelming weight that is swung from a spring. As the spring is high touchy to the developments of the Earth at that point is the correct decision offer a seismograph.
On the off chance that this is changed by a pole, at that point it won't see the developments of the earth making the seismograph not precise and it would not work.