Use the drop-down menu to complete each statement. A good is considered when producers can quickly supply more or less of it based on changing prices. A good is considered when producers cannot quickly change how much of it is supplied when prices change.

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.