Nathan, a civil engineer in a construction company, is one of the best performers in the organization. he is assigned challenging projects by his manager. he delegates low-risk tasks in projects and takes up the high-risk ones. in the context of mcclelland's learned needs theory, nathan is most likely motivated by the need for

Need for achievement

Explanation:

The people who are motivated for achievement are more challenging. These select the project that is more challenging but not impossible. These types of people focus on the problem so they can sort out and can achieve the target. The people who work on the need for achievement are effectively working and complete the task alone or in a group.  

There are some characteristics of this type of person.

Thus here Nathan a civil engineer in a construction company is the best performer because of his high need for achievement.  

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

answer; the civil right act of 1964;