Answer: It can affect brain development, leading to learning and behavior problems.
Explanation:
Could either be an exclamation mark or just a period. It depends on the context and only so little was given
Answer = Evidence
Making inferences means to draw reasonable conclusions. This process involves analyzing the evidence of the text because this is the support of the inference and using background knowledge or information you already know.
The underlined term (flies) used verb+es which is used to describe the verb that still being doned regularly.
If the verb is currently being done , the verb will use-ing , if it's a plan in the future, we will see 'will' before the verb and the verb will not use -es
hope this helps