Which of the following is the contribution of al-khwarizmi to the world of mathematics?
a. he developed the formula and process used to make persian rugs.
b. his work became the basis for algebra.
c. he created the number system based on chinese number system.
d. he determined the formula for finding the hypotenuse of a right triangle.

bru what tyep of qus is dis

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.