Is a three-dimensional piece of art defintion

What is von petzinger really interested in finding out through her studies in cave art?

Select the correct answer. what are the two types of lighting? a. dark and light b. key and fill c. gobos and snoots d. incident and reflected e. polarizing and optical

Need some ! asap i need to figure out 3 major changes in bridges over time and why these changes to adapt to both improvements in technology and changing social links would also alot.