According to social exchange theory, an individual’s primary motive in establishing and maintaining relationships is

a. maximizing rewards and minimizing costs.
b. achieving an equitable balance of inputs and outputs.
c. maintaining reciprocal levels of self-disclosure.
d. the reproductive fitness of a potential partner.

a.maximizing rewards and minimizing costs.      

Explanation:

Social exchange theory was proposed by a famous sociologist named George Homans and is described as the tendency of individuals to weigh the risk of social relationship and potential benefits. In other words, the theory says that an individual's social behavior is often considered as the consequence of an 'exchange process' and the purpose associated with exchange is to minimize costs and maximize benefits.

The correct answer for the question is a.

uses : -

1.aneroid barometers primarily measure whether pressure is rising or falling.

2.aneroid barometers are often used for reading pressure in homes and recreational boats.  

3.other uses may include barographs in meteorology and altimeters in modern aircraft.  

4.this type of barometer can announce whether a high or low pressure system is coming or whether it is becoming more intense.  

5.there are different types of aneroid barometers, such as the altimeter, which measures altitude, or distance above sea level.  

6.another example is a barograph, which is a modified aneroid barometer that provides constant readings of atmospheric pressure on graph paper.  

7.when used in this capacity, the aneroid barometer can store a week's worth of data.

android diameter a device for measuring atmospheric pressure , often specially calibrated for use as an altimeter ,consisting of a box or chamber partially exhaused of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air

refer to the attachment for the characteristics : -