15. which of the following statements is best
supported by the information in the graph?
o a. pebbles are able to be moved at slower
stream velocities than silt particles.
o b. streams are only able to move particles
less than 1 cm in diameter, and all other particle
sizes can only be moved in rivers.
o c. particle diameter controls stream velocity
across all scales.
o d. small increases in stream velocity can lead
to many changes in particle size at slower
velocities, but changes in larger particle sizes
require more significant changes at higher
velocities.