Why does death of hair cells in the cochlea cause hearing loss?

There are traits like blood type and eye color, and others like speaking english or having a scar. what are the terms used to describe these different types of traits? how are each defined?

Using the factors of production to make one product always means that o .) a company may experience a shortage of materials o . )a nation can make more money o. ) it is possible to make too many of that product o. ) fewer resources are left to make something else

Icivics worksheet : rules for running a country