Final answer:
The best topic sentence for the first body paragraph of Jada's essay is one that introduces the problem caused by the European Starling: their increasing numbers and the consequential damage to crops and spread of invasive seeds across the US.
Step-by-step explanation:
The topic sentence for Jada's first body paragraph in her problem and solution essay about the European Starling could logically be 'Due to the skyrocketing numbers of European Starlings across the United States, damage to crops and the spread of invasive seeds are increasing.' This sentence introduces the scope of the issue and presents the problem that will be discussed in detail in the following paragraph, setting the stage for explaining the potential solutions to address the invasion of European Starlings, such as the use of special nets, frightening machines, and Starlicide.