In the context of motivation, identify a difference between lower-order needs and higher-order needs.
a. lower-order needs are concerned with belongingness, relatedness, and affiliation, whereas higher-order needs are concerned with safety.
b. unlike higher-order needs, lower-order needs are concerned with influence.
c. lower-order needs are concerned with physiological and existence requirements, whereas higher-order needs are concerned with esteem, self-actualization, and growth.
d. unlike higher-order needs, lower-order needs are concerned with challenges and accomplishments.

C) Lower needs are concerned with the physiological needs and existence requirement whereas higher needs are concerned with self-esteem, self-actualization, and growth.  

Explanation:

Mash-low hierarchy of needs is a motivational theory that describes the human needs in a pyramid  

There are from lower to higher study needs are there :

The first three needs are lower. Without completion or fulfillment of these needs, we can not reach the higher needs called the last two needs.

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.