Final answer:
Hezbollah, al-Qaeda, and ISIS are key players in Middle Eastern geopolitics and global security, with the latter two groups being targets of an international effort led by the United States to combat terrorism and restore regional stability.
Step-by-step explanation:
The complex dynamics involving Hezbollah, al-Qaeda, and ISIS highlight significant geopolitical challenges and ideological conflicts in the Middle East. Hezbollah, an anti-Israel group based in Lebanon, has engaged in confrontations with Israel and impacted Lebanon's stability, with external actors like Syria playing roles in the country's internal affairs. The emergence of ISIS, claiming to establish a caliphate and authority over Muslims, led to a U.S.-led coalition's intervention in Iraq and Syria, aiming to defeat this extremist group. ISIS, having roots as an al-Qaeda affiliate, has orchestrated violence across multiple countries, adding to the regional and global security concerns. These organizations' impacts on terrorism, state sovereignty, and regional stability make the fight against them a key issue for the international community, including the United States and NATO allies.