Restaurant  owners  have to know how    1     ( make) food. They also have to know how to make money. Here are some things they      2       (learn) from scientific studies. The color red     3      (make) people hungry. Red also makes customers     4       (eat) fast food restaurants, therefore, have red furniture or walls. Soft colors like pink and light blue make people    5      ( relax), so they spend more time      6      (eat) their meals. Soft lighting    7        ( make )people look good, but it makes food look bad. Loud music  makes people want      8    (  leave). Hard seats also    9       ( make ) customers want to eat quickly and leave. Many restaurants, especially fast food restaurants, use this knowledge 10        (make) customers eat faster.