Which description fits with the term biomass? Choose the correct answer. O the producer-to-consumer ratio in an ecosystem
O the mass of all living things on Earth
O the unused material excreted as waste in an ecosystem
O the mass of the living and dead organisms in a given area

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.