ANSWER ALL THE QUESTIONS

THE QUESTIONS IS ON THE PHOTO

(1.) several hierarchical levels in an ecosystem, that share the same function in the food chain and the same nutritional relationship to the primary sources of energy (2.) that only ten percent is available to the next level  

Explanation:

answer; ////increased water pollution; ///////////////////////

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."