Sexual propagation involves the use of

This question is asking about the method of sexual propagation in plants. Sexual propagation involves the use of different plant parts or structures to produce new plants.

The options given are:

- Option A: Bulbs

- Option B: Seeds

- Option C: Cuttings

- Option D: Vines (Correct)

Bulbs, such as onions and tulips, are actually a form of asexual propagation where new plants are produced from buds or cloves found at the base of the bulb. So, option A is not the correct answer.

Seeds are the result of sexual reproduction in plants. They contain the genetic information from both the male and female parent plants. When seeds are planted in suitable conditions, they germinate and grow into new plants. So, option B is a correct answer for sexual propagation.

Cuttings involve taking a part of a plant, like a stem or a leaf, and placing it in a suitable growing medium. The cutting develops roots and eventually grows into a new plant. This method is called vegetative propagation and is a form of asexual reproduction. Therefore, option C is not the correct answer for sexual propagation.

Vines are plants that climb or sprawl using specialized structures such as tendrils or clinging roots. Some vines, like grapes or passionfruit, reproduce sexually by producing seeds. These seeds can be used for sexual propagation. Therefore, option D is the correct answer for sexual propagation in the context of vines.

So, the correct answer to this question is Option D: Vines.