Here are the correct matches for the terms and definitions:
- Geotropism: c. changes in plant growth due to the force of gravity
- Positive phototropism: d. tendency for a plant to grow toward light
- Alternation of generations: a. life cycle, occurring in plants and some other organisms where they have a sexual and an asexual stage
- Tropism: b. changes in plant growth that result from changes in environmental stimuli such as light, gravity, and/or touch