Answer:
(a). as the combination of IP address and port number to allow an application within a computer to set up a connection with another application in another computer without ambiguity.
Explanation:
The explanation is in the answer.
No, this website is not for study groups. It's more of a 'question and answer' website. There is no actual communication on one certain subject. Although I do know a few websites that have worked really well for me,where you can create and participate in study groups;
-studyblue
- studyhall
- getstudyroom
all of these are safe websites that are used by wide variety of students, therefore i'm sure you can find plenty of people interested in learning the same things as you!
Answer:

Explanation:
Given
On Earth

On the moon

Required
The astronaut's mass on the moon
The mass of an object do not change base on location
So, if the mass of the astronaut is 80kg on earth, it will be 80 kg on the moon.
Hence:

To support a position
It’s the only answer that makes sense so you’ll have to figure out the rest but to support a position is definitely correct