Development is the result of an interaction between biological and environmental forces. this statement most closely describes theory.

Epigenetics theory

Explanation:

Epigenetics studies changes that are inherited through gene expression without an alteration to the DNA sequence. This means changes in phenotypes but no changes in genotypes, epigenetic occurs naturally but can also be affected by age, environment and diseases.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.