industry has lowered its labor costs through\no the use of tablet computers.\no advances in robotics.\no…

Brief Explanation:

Advances in robotics can replace human - labor tasks, reducing the need for a large workforce and thus lowering labor costs. Tablet computers are mainly for productivity and communication, faster communications don't directly cut labor costs, and just - in - time manufacturing is about inventory management rather than directly reducing labor costs.

Answer:

advances in robotics.