If fire underneath an object will cause thermal expansion, then what underneath an object will cause thermal expansion? Answer choices: - ice - Gases - LEDs - iron - fire - energy - fan - nothing
fire

If cells are the basic units of the structure and function of an organism, then what are cells the basic units of the structure and function of? Answer choices: - humans - Most plants - animals - Cell service - Organisms - mammals - Lego cells - Buildings
Organisms

If playing is one of many ways animal improve ability to survive and thrive, then playing is one of many ways animal improve ability to what? Answer choices: - Decibels - find habitat - mate - exercise - health - grow - survive - sound
survive