How are seawalls used to control coastal erosion?

seawalls reduce the energy of destructive waves and wave pounding.

seawalls increase the energy of destructive waves and reduce wave pounding.

seawalls break up the waves offshore and change their direction, reducing their energy.

seawalls are not used to control coastal erosion but do prevent longshore drift from occurring.

Which experiment would most likely contain experimental bias ?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla