which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluff their feathers?

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

What landform is circled in the map above?

How did trade contribute to the spread of the plague in the 1300s? trading vessels from the americas brought the plague to london, where it spread across europe. trading caravans from mongolia brought the plague to rome, where it spread across europe. trading caravans from russia brought the plague to barcelona, where it spread across europe. trading vessels from china brought the plague to sicily, where it spread across europe.