A heterotroph is an organism that can not
make its own food.
Which of these is a
heterotroph?
A. frog
B. rose bush
C. ferns
D. maple tree

maybe A. Frog

A frog

Explanation:

Frogs cannot make their own food while all of the other 3 can make their own food.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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.