Question

What part of the flower is often scented to attract insects and animals?

Answer 1

Hint: The reproductive structure of flowering plants is the flower, also known as a bloom or blossom. A flower's biological function is to aid reproduction, usually by providing a mechanism for sperm and eggs to unite.

Complete answer:
The volatile organic compounds (VOCs) or aroma compounds emitted by floral tissue are referred to as floral scent or flower scent (e.g. flower petals). Aroma, fragrance, floral odor, and perfume are all terms used to describe floral scents. Most flowering plant species have a wide range of volatile organic compounds (VOCs), sometimes up to several hundred.
The primary functions of floral scent are to repel herbivorous and especially floriferous insects, as well as to attract pollinators (see Plant defense against herbivory). Along with visual cues, floral scent is one of the most important communication channels mediating plant-pollinator interactions (flower color, shape, etc.).
Floral scents are used by plants in their floral tissues, such as their petals. The floral scents begin as volatile organic compounds, which are organic chemicals (VOC). Chemoreceptors, which create an olfactory response in animals to draw them into the flowering plant, attract the insects and animals that visit these flowers. The petals of flowers contain a lot of VOCs. Flower petals attract pollinators not only because of their scent but also because of their color. The color of an insect or animal can attract more of that species depending on the species.

Thus, petals are often scented to attract insects and animals.

Note:
Most flowering plants emit floral scents in a predictable pattern throughout the day, following a circadian rhythm. The intensity of the light influences this variation. Chemoreceptors with variable specificity to a specific VOC are used by flower visitors such as insects and bats to detect floral scents. The fixation of a VOC on a chemoreceptor activates an antennal glomerulus, which then projects on an olfactory receptor neuron, triggering a behavioral response after the information has been processed (see also Olfaction, Insect olfaction).