The figure is for question 3, but answer question 4 as well

Question 3 (4 points) Which bathymetric technique is illustrated in Figure 3.3 in the BIOL 181 lecture notes? io Sound signals sent to the ocean floor, measure the echo's return time (_) Satellite remote sensing for accurate measurements @ The use of heavy weights and lines to measure ocean depth (_) Lasers are used to identify ocean floor features Question 4 (4 points) Which of the following processes removes salt from the ocean? Select the five (5) correct answers. () Physical and chemical weathering of rocks on land, and river runoff. |_) Evaporation leaves salt deposits @ lons can adhere to small particles in a process called adsorption ) Biological organisms concentrate ions in their feces and shells ij Salts are then incorporated in sediments. (_ | Sea spray leaves some salt on land Released through volcanism and hydrothermal vents from the crust and interior of the earth