Explanation
Correct answer: D.
Choice D is the best answer. "Likewise" logically signals that the information about Albert’s son David is similar to the previous information about Albert Popa. Both artists have used unconventional surfaces for their work: Albert used concrete, and David is using ice floes.
Why the other choices are wrong
Choice A
Choice A is incorrect because "however" illogically signals that the information about David contrasts with the previous information about Albert Popa. Instead, it is similar to the previous information about Albert Popa.
Choice B
Choice B is incorrect because "indeed" illogically signals that the information about David emphasizes or strengthens the previous point about Albert Popa. Instead, it is similar to the previous information; it highlights a similarity between father and son.
Choice C
Choice C is incorrect because "second" illogically signals that the information about David is a second point or reason separate from the previous information about Albert Popa. Instead, it is similar to the previous information; it highlights a similarity between father and son.