Which of the following variables has a negative relationship with the level of economic development of a country? A. Percent of labor force in tertiary sector of economy
B. life expectancy
C. percent of urban population
D. literacy rate
E. birth rate​

Computer models can scientists predict weather. some computer models can show the predicted path of hurricanes. what other events could a computer model warn us of? a) undersea earthquakes , tornadoes, and avalanches b) tornadoes c) avalanches d) undersea earthquakes

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.

He resistance of a liquid to flowing is called