Which organelle would the spirulina bacterium have provided?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which description provides the best objective summary of the article in the passage?

Which is one example of a phenotypic change that is not genetic