What is important to understand when searching using subject headings?

The lifeguard at the local beach record the tides each day the chart below shows the high and low tides over two days

He dutch west india company wanted to establish a colony in north america to expand its trading empire. enjoy religious freedom. encourage catholics to leave holland. form a representative democracy.

The purpose of laws were to restrict the rights of african americans who lived in southern states. a) "jim crow" b) "civil rights" c) "anti prohibition" d) "reconstruction acts"