Final answer:
The advertisement demonstrates a height and weight bias, as these requirements may not be directly related to job performance and could unnecessarily exclude qualified candidates.
Step-by-step explanation:
The advertisement for a security guard position requiring the applicant to be at least six feet in height and weigh at least one hundred and eighty pounds illustrates a height and weight bias. This type of requirement does not relate directly to the skills or qualifications necessary to perform the job and could exclude capable candidates based on physical characteristics. According to the U.S. Equal Employment Opportunity Commission (EEOC), it is illegal to discriminate against a job applicant based on personal attributes that do not affect job performance.