On a fishing trip, Ed realizes that he has mistakenly packed the sewing box instead of the tackle box. He wants to fish but returns home because he does not have any line or hooks. Ed's failure to realize that sewing thread can be used as fishing line and that a bent needle can be used as a hook is an example of .

The answer is functional fixedness.

Explanation:

Functional fixedness refers to the inability to use an object in a different way than usual. For example, if a person is looking for a pair of scissors to cut paper, he might not realise he can also use a utility knife or even a ruler.

Studies have shown that very young children do not present functional fixednesss. Instead, it appears around age seven, when children learn to use objects "properly".

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.