Ihave been losing brainliest points. how can that happen?

You may lose points for answering questions, thats the only way 

Answer   (1) u.s.coast guard                (2)president major disaster declaration                (3) 72 hours;                 (4) u.s coast guard auxiliary;

Psychologists often talk of the magical number "7" - so it is generally assumed that we can keep 7 (more or less, so 5-9 is the correct answer) items in our short term memory - we know this as a result of many experiments.

we can increase this by chunking, so for example "7 8 9 5 3" is harder to remember than "78 95 3" - try it yourself!

the answer is a)