Fill in the Blanks (Reading & Writing)

During the 1800s, the ice trade —harvestedharvestingharvestharvests natural ice cut from frozen lakes and shipped it to warmer regions for storage and sale. Insulated warehouses helped —preventpreventingpreventedprevention the ice from melting too quickly during transport. This industry eventually —declineddecliningdeclinedeclines once mechanical refrigeration became widely available.