How does sonar technology measure the depth of the ocean floor? A
The device sends sound signals to the ocean floor and records the time it takes for each signal to return.

B
The device receives electromagnetic energy that is emitted by cooling oceanic crust.

C
The device lowers a cord from a ship to the bottom of the ocean and records the cord's length.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

wha is what i will use to get my free points

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.