answer:Legitimate archaeological research involves obtaining permission or permits to conduct excavations, surveying and documenting sites, following ethical guidelines and minimizing damage to artifacts, using scientific methods to gather and analyze data, publishing findings in peer-reviewed journals, and engaging with the wider archaeological community. Pseudoarchaeology, on the other hand, often lacks archaeological training or expertise, relies on speculative or untested theories, uses unreliable or fraudulent methods, and ignores or manipulates evidence to support preconceived ideas or agendas.

answer:Austin Cindric won the 2020 NASCAR Xfinity Series championship.

answer:The 20th-century Tamil-language writer known for his social commentary is Pudhumaipithan.

answer:Advantages: 1) Effective in coastal areas and shallow waters. 2) Can provide close support to ground troops. 3) Can carry out raids and special operations. 4) Can be used for reconnaissance and surveillance. 5) Can provide security to shipping routes. Disadvantages: 1) Limited range and endurance. 2) Vulnerable to air and missile attacks. 3) Expensive to operate and maintain. 4) Limited firepower compared to larger warships. 5) Can escalate tensions in conflict situations.