Final answer:
The Gherkin in London is the structure associated with renowned architect Norman Foster. Norman Foster, known for designs such as Apple Park, has made significant contributions to modern architecture with his innovative and environmentally sustainable designs.
Step-by-step explanation:
The structure associated with celebrated architect Norman Foster is C. The Gherkin. Norman Foster is a prominent British architect known for futuristic designs and innovative use of technology in architecture, with a particular focus on environmental sustainability. Foster has designed a number of iconic buildings around the world, including Apple Park in Silicon Valley, California. Apple Park is noted for its spaceship-like design with a continuous wall of curved glass and a building powered by renewable energy with a solar roof covering.
Contrastingly, the Sydney Opera House was designed by Jørn Utzon, the Burj Khalifa was designed by Adrian Smith at Skidmore, Owings & Merrill, and The Shard in London was designed by Renzo Piano. It is important to differentiate these architects and their works as each holds a significant place in the field of architecture and has contributed uniquely to modern architectural design.