Elijah goes into the library to find his friend aimee who went there to study. he walks through the library until he sees her and then sits down beside her. later elijah's friend marvin comes over and says, "hey, man, why did you ignore me when you walked right past me a minute ago? " elijah shakes his head, not knowing why he didn't see marvin. elijah's failure to see marvin when he was focusing on finding aimee is an example of

Elijah's failure to see Martin when he was focusing on finding Aimee is an example of  "selective perception".

Selective perception refers to the tendency not to notice and all the more rapidly overlook upgrades that reason passionate uneasiness and negate our earlier convictions. For instance, an instructor may have a most loved understudy since they are one-sided by in-amass bias. The instructor overlooks the understudy's poor achievement. On the other hand, they probably won't see the advancement of their minimum most loved student.

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

im sorry i wish i can but try google