Fact 1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens.

Fact 2: Antibodies are designed to bind with foreign proteins, called antigens.

Given the two facts above, answer the question "Antibodies are large, Y-shaped proteins designed to bind with what?" with the following options: 
- heat or cold
 - Allergies
 - major threat to health
 - Veins and arteries.
 - foreign proteins
 - epidermis and dermis
 - harmful substances
 - wavelengths and photons


 

     foreign proteins    