What is a possible result of increased irrigation of agricultural fields? Decreased need for fertilizers
Depletion of water resources
Increased nutrients in soil
Increased use of pesticides
No change in crop yield

Answer the above statement is (true);

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)