Study this image. Which statement best describes the rock shown?

The grains of this rock are jagged.
The grains in this rock are tiny.
This rock has a non-banded pattern.
The color of this rock is determined by its texture.

(C). an emerging disease.

Explanation:

Emerging disease can be defined as a disease, which has recently infected people of a population or disease whose geographic range or incidences are rapidly increasing in the near future.  

Previously, Lyme disease was geographically restricted to to the north-east United States, but now it is spreading significantly to the other regions. This makes it an example of an emerging disease.

Thus, the correct answer is option (C).