Responder: en qué nivel de organización situarían a: una molécula de ADN,
una bacteria, un hígado, un cloroplasto, un trozo de hierro, un grupo de
palomas, un pez, un río con peces y algas, un pulmón. ¿cuál de estos niveles
tiene vida?

b is the best answer for this question.

i am going to guess that it is co2.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.