Final answer:
The footnote supports the paragraph by providing statistics on recycling rates.
Step-by-step explanation:
The correct answer is a) It provides statistics on recycling rates.
The footnote supports the paragraph about supporting recycling plants in Texas by providing statistics on recycling rates. These statistics serve as evidence to show the impact and effectiveness of recycling in preventing pollution and toxic chemicals. By including specific numbers and data, the writer strengthens their argument and highlights the importance of recycling plants in Texas.