Which section is better for beam?

Could you please elaborate on the topic of "Which section is better for beam?"? Are you referring to a specific engineering context, such as the design of a building or bridge? Or is this related to some other type of application, like materials science or physics? Additionally, could you provide more details about the "beam" you're discussing? Is it a structural beam, an optical beam, or perhaps something else? This would help me better understand your question and provide a more accurate and useful response. Thank you for your clarification.