Wasps are usually attracted to:

Wasps are generally attracted to a variety of stimuli, which includes all the options provided. They are notably drawn to sweet odors, particularly as summer progresses and food sources become scarcer. Sweet smells can originate from fruits, sugary drinks, or other food items.

In addition to sweet odors, wasps are also attracted to protein, which is essential for their growth and development, especially for feeding their larvae. This includes protein sources such as meats, fish, or other protein-rich foods that may be present during outdoor activities like picnics and barbecues.

Bright colors can also attract wasps, as they may perceive these bright hues similarly to flowers, which are food sources for other species. Colors like red, yellow, and other vivid tones can catch their attention and lead them to food sources or nesting areas.

Given that wasps are influenced by a combination of these factors—sweet odors, protein sources, and bright colors—it's accurate to say that they are attracted to all of the above options. This multifaceted attraction plays a significant role in their foraging behavior and environmental interaction.