In her first test, she tries to hydrolyze a portion of the contents of each tube. Hydrolysis occurs in all tubes except tube B. In her next test, she finds that tubes B, C, and D are positive for nitrogen but only tube D gives a positive result for the presence of sulfur. The last test she performs shows that the compound in tube C contains a high percentage of phosphate.

they deliver oxygen to the blood

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.

b is the answer and if you need further with anything message me