Which is not caused by secondhand smoke?

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Vertebrates have this type of circulatory system: wut i it owo

When creating a plan for the use of space in an early childhood educational setting, it is best to plan for clear passageways throughout the classroom. design only small, cozy spaces so that children feel safe. keep check-in and check-out areas outside the room. thoroughly conceal the toilet and hand-washing area for privacy.

What can you do to support your own mental health and physical health?