Fact 1: Nectar is used for attracting pollinators by plants.

Fact 2: Birds are flowering plant pollinators.

Given the two facts above, answer the question "What is used to attract birds to flowering plants?" with the following options: 
- cellulose
 - Collagen
 - chemicals
 - energy
 - seeds
 - a chime
 - nectar
 - hormones


 

       nectar  