Answer:
False.
Step-by-step explanation:
It is not true that despite external influences, cultures don't change because cultures are a set of values and practices which are affected by external and other environmental influences.
For instance, if cultures were innate and rigid, then every society would have similar culture all over the world. However, that is not the case because every society has their own distinct culture according to its geographical, regional, climatic, and other structural conditions.
A society that lives in a tropical island would have different cultural practices than the ones in colder regions or lowlands. It proves that culture can be influenced by eternal and other environmental influences.