Lampreys are known to attach themselves to fish. in doing so they rasp off a section of the fish with hard keratinized structures and "feed" on the blood and fluid that oozes into their oral cavity. fish can survive with a lamprey attached, but they have to expend extra energy swimming with the lamprey attached. this association would be designated a:
a) mutualism.
b) parasitism.
c) predation.
d) commensalism.

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

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.

answer; ///(a) ;

answer: d. load

a river's load refers to the natural phenomena in which the sediments, rocks   stones, boulders and other deposits are removed and picked from the bottom bed of the river due to the abrasion resulted by the high speed water current.