The answer is C, cactus and sage bush
Producers biology definition: Producers are any kind of green plant. Green plants make their food by taking sunlight and using the energy to make sugar. The plant uses this sugar, also called glucose to make many things, such as wood, leaves, roots, and bark.
Answer:
Option D, 63 cm
Explanation:
The scale of model is of local park is 
This means that each dimension of the model is 21 times smaller than the actual park (to be developed in future)
Given -
Depth of the pond
centi meter
Depth of the real pond will be 21 times of the depth of the model.
Thus , real pond's depth is equal to
cm
Hence, option D is correct
Answer:
C. The population of mice would decrease.
Explanation:
They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.