Answer:
3. B, D
Explanation:
A primary source is an animal that eats only plants. (herbivore) A secondary source is an animal that only eats herbivores (carnivores)
B has birds; which are food for carnivores, and fruits, nuts, and blossoms; which are food for herbivores.
D has vegetables and grains; which are food for herbivores, and meat; which is food for carnivores
The other options have only food for carnivores, or only food for herbivores, so the answer is 3
Natural selection leads to evolution because the strongest survive and pass on their genes
Answer:
Explanation:
for example addind electricity helps the community to do more work that would improve the function of the city or addind more factories would increase the production and the economy of the city
