b. ocean plants. 5.Fossils of aquatic reptiles found in freshwater rocks suggested to Wegener that these reptiles a. swam the great distances between continents. c. ate Glossopteris. b. probably did not cross the oceans. d. once lived in Earth's oceans. d. tropical flowers.

## Step 1<br />This problem is about understanding Alfred Wegener's theory of continental drift. According to this theory, the continents were once joined together in a single supercontinent, known as Pangaea, and have since drifted apart. The evidence supporting this theory includes the presence of similar fossils on different continents.<br /><br />## Step 2<br />The question presents four options and asks us to determine which one best supports Wegener's theory. The options are:<br />a. swam the great distances between continents.<br />b. probably did not cross the oceans.<br />c. ate Glossopteris.<br />d. once lived in Earth's oceans.<br /><br />## Step 3<br />We can eliminate options a, c, and d. Option a suggests that the reptiles swam across the oceans, which is unlikely given the vast distances involved. Option c suggests that the reptiles ate Glossopteris, a type of plant, which doesn't provide evidence for continental drift. Option d suggests that the reptiles lived in the oceans, which doesn't necessarily support the idea of continental drift.<br /><br />## Step 4<br />Option b, "probably did not cross the oceans," is the most plausible explanation. If the reptiles did not cross the oceans, it suggests that the continents were once joined together, allowing the reptiles to live on them without needing to swim across vast oceans. This supports Wegener's theory of continental drift.