Natural wetlands are lands which, due to geological or ecological factors, have a natural supply of watereither from tidal flows, flooding rivers, connections with groundwater, or because they are perched above aquifers or potholes.
Realize that many verbs can be both transitive and intransitive. An action verb with a direct object is transitive while an action verb with no direct object is intransitive. Some verbs, such as arrive, go, lie, sneeze, sit, and die, are always intransitive; it is impossible for a direct object to follow.
Some verbs take an object (transitive verbs) while others do not (intransitive verbs) and may be followed by nothing. Verbs can be followed by many forms but some of the most common can be seen in the links on the right: verbs followed by to + infinitive. verbs followed by -ing clauses.