The first sentence is incorrect. The second sentence corrects the first sentence by creating a relative clause ("which...devices"). The sentence is complete without the clause. Also, for proper verb agreement, it should read, "...the ideas of X, which navigate tradeoffs..." (ideas (plural) navigate).

The first sentence is incorrect. The second sentence corrects the first sentence by creating a relative clause ("which...devices"). The sentence is complete without the clause.

The first sentence is incorrect. The second sentence corrects the first sentence by creating a parenthetic clause ("which...devices"). The sentence is complete without the clause.

The first sentence is incorrect. The second sentence corrects the first sentence by creating a relative clause ("which...devices"). The sentence is complete without the clause. Also, for proper verb agreement, it should read, "...the ideas of X, which navigate tradeoffs..." (ideas (plural) navigate).