Final answer:
Focus groups and survey techniques were used to address environmental pollution and contamination, alongside observation methods for assessment.
Explanation:
Focus groups were utilized to engage a small group of subjects in structured discussions about environmental pollution, seeking solutions. This method allows facilitators to lead discussions to build a holistic understanding of the issue based on participants' comments.
Survey techniques were employed to gather data on the environmental contamination situation. Participants were interviewed to ensure a comprehensive coverage of topics related to environmental indicators.
Observation methods were likely used to assess the environmental contamination situation at the identified site before implementing measures to address the issue.
Learn more about Environmental pollution and techniques for addressing it here:
https://brainly.com/question/51222445