I think the answer is a personal characterization
Answer: ducks,
Explanation: First of all it can’t be a period considering that the rest of the sentence is not campitalized. Second why would it be ; it has no need for that. The only reasonable answers are ducks and ducks,
Subject: project manager
verb: looked
Answer
Extending from sea level at the Gulf of Mexico to over 8,000 feet in the Guadalupe Mountains of far West Texas and from the semitropical Lower Rio Grande Valley to the High Plains of the Panhandle, Texas has a natural environment best described as "varied." Below is a summary of the size, the boundaries, the high tempatures.
Explanation: