3. Di dalam kehidupan masyarakat seseorang yang mengalami perubahan atau pergerakan status sosial lapisan ke lapisan lainnya menjadi lebih tinggi atau menjadi lebih rendah dari sebelumnya Keadaan ini disebut dengan __ A. kelompok sosial C. perubahan sosial B. mobilitas sosial D. status sosial

The correct answer is **B. mobilitas sosial**.Here's why:* **Mobilitas sosial** refers to the movement of individuals or groups between different social positions. This movement can be upward (gaining a higher social status) or downward (losing social status).Let's look at why the other options are incorrect:* **Kelompok sosial (Social group)**: This refers to a collection of individuals who share common interests, goals, or characteristics. It doesn't specifically address changes in social status.* **Perubahan sosial (Social change)**: This is a broader concept that encompasses any significant alteration in the structure, function, or organization of society. While mobility can be a part of social change, it's not the defining characteristic.* **Status sosial (Social status)**: This refers to a person's position or standing within a society, often based on factors like wealth, education, or occupation. It describes a position, not the movement between positions. **Therefore, the term that best describes the movement of individuals between social layers is "mobilitas sosial" (social mobility).**