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​

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

What is the biggest country in south america?

What processes does carbon cycle through the biosphere?