Step 1: Understanding Fossils.
Fossils are the preserved remains or traces of ancient organisms. Trace fossils are those that show the activities or behaviors of ancient organisms, such as footprints or burrows.
Step 2: Analyzing the options.
(A) pseudofossils: Incorrect — Pseudofossils are markings that resemble fossils but are not formed by biological activity.
(B) coprolites: Incorrect — Coprolites are fossilized excrement, not footprints or burrows.
(C) body fossils: Incorrect — Body fossils are the remains of the organism itself, such as bones or shells.
(D) trace fossils: Correct — Trace fossils include footprints, burrows, and other marks made by an organism's behavior.
Step 3: Conclusion.
The correct answer is (D) trace fossils, as burrows and footprints are examples of trace fossils.