11. Which of the following provides a constant input of energy that all organisms depend on? a secondary consumers
b. primary consumers
C. carbon
d. the sun

Which of the following regions has what is considered the most rugged terrain in oklahoma? a. the wichita mountains b. the arbuckle mountains c. the sandstone hills d. the ouachita mountains

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

About 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war ii