The concentration of toxic chemicals as it progresses through the food web.

 Biomagnification, each level of the food chain has a greater concentration of contaminant. Biomagnification is the process by which toxic chemicals build up within predators

Explanation:

increases

Explanation:

According the biomagnification phenomenon when the toxic chemical enters in the food web in the form of chemical insecticide or pesticide its concentration increases in successive trophic levels. The top level consumers or tertiary consumers or quaternary consumers face mortality due to accumulation of toxic in higher concentration due to consumption of organisms at lower trophic levels as organisms of the lower trophic levels consume the toxic and incorporate them in food chain or food web. Such chemicals cannot be digested or degraded in the body, thus they are passed on from one trophic level to another in a food chain or food web.

It’s A. increases

Explanation:

right on the quiz

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 : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]