If something that is secreted in a shallow cup is used by plants to attract pollinators, then what do plants use to attract pollinators?

Answer choices:
- Something made from fermented ricce
 - Something made primarily of oxygen and nitrogen
 - Something that is secreted in a shallow cup.
 - Something that grows into the ground
 - chain called a polynucleotide
 - Something that vaporizes into the air
 - Something that grows on a bush
 - chemical compound NaCl

 

   Something that is secreted in a shallow cup.       