Which of the following structures have a plane of symmetry? 
Definitions:
Developed Nations
Countries characterized by high levels of economic development, advanced technological infrastructure, and high standards of living.
Child Labor
The employment of children in various industries or businesses, often in conditions that are exploitative or harmful to their development.
Poor Countries
Nations characterized by low levels of economic development, limited resources, and often high rates of poverty and insufficient access to basic needs such as education and health care.
Social Change
The transformation over time of the institutions, culture, and norms within a society, often driven by collective behavior and social movements.
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