Complete each sentence choosing the correct option
In parts of the world, including the British Isles, the term "vine" usually
applies exclusively ____ grapevines., while the term "climber" is used for all climbing plants.
Certain plants always grow as vines, while a few grow as vines only part ____ the time. For instance, poison ivy and bittersweet can grow as low shrubs when support is not available, but will become vines when support is available.
A vine displays a growth form based on long stems. This has two purposes. A vine may use rock exposures, other plants, or other supports for growth rather than investing energy in a lot of supportive tissue, enabling the plant to reach sunlight with a minimum investment of energy.
Choose the letter of the correct preposition.