Final answer:
Soil creep is a common process that can create various landforms such as terracettes and is considered true to produce a rich array of landforms.
Step-by-step explanation:
Soil creep is indeed a common process that contributes to the gradual movement of soil down a slope due to gravity. It is classified as a very slow mass wasting process and does produce a range of landforms. This phenomenon can lead to the formation of features such as terracettes, also colloquially known as 'sheep tracks,' which are small, step-like terraces on grassy slopes. The assertion that soil creep produces a rich array of landforms is true.