Answer:
b
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A theory is a set of ideas or facts that explains an existing predicament or situation. In this case, the problem presents a statement on the theory of evolution. The phrase that describes a theory is that "all life is related and that organisms have become more complex over time."
Answer: the leaves will start turning yellow and the stem or stalk will grow longer towards the direction of sunlight.
Explanation: lack of enough sunlight causes plant leaves to loose chlorophyll (the green pigment responsible for photosynthesis). Also auxin; a plant growth hormone will be secreted in the stem to stimulate growth towards the direction of sunlight.