Which characteristic is an advantage that ectoparasites have over endoparasites? a. they can more easily disperse to other hosts. b. they are less exposed to predators. c. they are less exposed to changes in the external environment. d. all of the above?

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.