A type of symbiosis where one species benefits and the other is not helped or harmed?

What are the two main ideas of this passage? museum experts feel that museums must change to attract visitors. museum experts care more about the number of visitors than about history. museums that display artworks and exhibits do not make families welcome. museums like colonial williamsburg make learning about the past fun. museums in the united states are different than in other countries.

The use of a beat or a rhythm to remember something is

Which economy enables demand for a product or service to drive all the businesses decisions business decisions are driven by demand in a ( an ) economy