Final answer:
Phillip K. Smith III's Lucid Stead and Alexander Calder's Untitled are similar in their use of movement and interaction with the viewer. Both artists create sculptures that engage the senses and demonstrate the laws of variation found in life.
Step-by-step explanation:
Phillip K. Smith III's Lucid Stead and Alexander Calder's Untitled are similar in their use of movement and interaction with the viewer. Both artists create sculptures that engage the senses and demonstrate the laws of variation found in life. Calder's mobiles and stabiles are designed to move and create changing shadows, while Smith's Lucid Stead uses light to transform the perception of space and the environment.