Which is true of a step down transformer but not a step up transformer

Which is true of a step-down transformer but not a step-up transformer? The core is made of copper and the coils are made of iron. The primary winding has fewer coils than the secondary winding. The primary winding has more coils than the secondary winding.

Explanation:

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.