PLZZ HELP 20 POINTS Scientists found two ammonite fossils in rock layers far across the ocean floor from each other. Ammonite existed during a brief period of time. Knowing this, answer the following questions:

BLANK 1: What type of fossils would ammonites be considered?

BLANK 2: What could scientists infer about the rock layers containing the fossils?

BLANK 3: If a new fossil was found in the layer beneath the ammonites, what would you automatically know about that fossil?

Why is the study of demography important to geographers

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity