The correct answer is option B) chromoplast.

Explanation:
Flowers exhibit a wide range of colors to attract insects for pollination. These colors are primarily produced by pigments present in specialized organelles called chromoplasts. Let's understand the role of chromoplasts in imparting colors to flowers.

**Chromoplasts:**

- Chromoplasts are a type of plastid, which are specialized organelles found in plant cells. They are responsible for the synthesis, storage, and accumulation of pigments that contribute to the coloration of various plant parts, including flowers.
- Unlike chloroplasts, which are responsible for photosynthesis and contain chlorophyll, chromoplasts lack chlorophyll and are therefore unable to carry out photosynthesis.
- Chromoplasts are primarily involved in the synthesis and accumulation of various pigments, including carotenoids and anthocyanins, which are responsible for the vibrant colors observed in flowers.

**Imparting Colors to Flowers:**

- Carotenoids: Carotenoids are lipid-soluble pigments that are responsible for yellow, orange, and red colors in flowers. They are synthesized in the chromoplasts and can be found in various flower parts such as petals, sepals, and stamens. Examples of carotenoid pigments include beta-carotene, lycopene, and xanthophylls.
- Anthocyanins: Anthocyanins are water-soluble pigments that are responsible for red, purple, and blue colors in flowers. They are synthesized in the chromoplasts and are found in the vacuoles of flower cells. Anthocyanins are pH-sensitive pigments, meaning they can change color depending on the acidity or alkalinity of the flower tissues. Examples of anthocyanin pigments include cyanidin, pelargonidin, and delphinidin.

**Importance of Flower Color:**

- The colors of flowers play a crucial role in attracting insects for pollination. Insects, such as bees and butterflies, have well-developed color vision and are attracted to specific flower colors.
- The vibrant colors produced by chromoplasts act as visual signals to attract pollinators. The insects are lured by the colors and are guided towards the flowers for nectar and pollen, thereby facilitating pollination.
- Different flower species produce different pigments, resulting in a diverse array of colors in the plant kingdom. This diversity allows for effective attraction of a wide range of pollinators, increasing the chances of successful pollination and subsequent seed production.

In conclusion, chromoplasts are responsible for imparting colors to flowers through the synthesis and accumulation of pigments such as carotenoids and anthocyanins. These vibrant colors serve as visual signals to attract insects for pollination, ensuring the reproductive success of flowering plants.

Chromoplast is a type of plastid which helps to impart colours to flower to attract insects for pollination. while other options chloroplast and leucoplast are also types of plastid but they perform different functions like chloroplast stores chlorophyll essential for photosynthesis and leucoplast stores oil, fat, amino acid . .......( upvote if this helps )