The correct answer is: All of the above.
Usgalimal, Rivona, and Morlem are all important prehistoric sites in Goa. Usgalimal is a rock shelter located in the village of Usgalimal, about 10 kilometers from the city of Margao. The site contains a number of rock paintings, which are believed to date from the Mesolithic period. Rivona is a village located in the Sanguem taluka of Goa. The site contains a number of megalithic monuments, which are believed to date from the Iron Age. Morlem is a village located in the Pernem taluka of Goa. The site contains a number of dolmens, which are believed to date from the Megalithic period.
Usgalimal is a rock shelter located in the village of Usgalimal, about 10 kilometers from the city of Margao. The site contains a number of rock paintings, which are believed to date from the Mesolithic period. The paintings depict a variety of animals, including deer, elephants, and tigers. They also depict human figures, some of which are hunting or dancing. The paintings are significant because they provide a rare glimpse into the lives of the people who lived in Goa during the Mesolithic period.
Rivona is a village located in the Sanguem taluka of Goa. The site contains a number of megalithic monuments, which are believed to date from the Iron Age. The monuments include dolmens, menhirs, and stone circles. The dolmens are stone chambers that are covered by a large stone slab. The menhirs are tall, upright stones. The stone circles are groups of stones that are arranged in a circular pattern. The megalithic monuments are significant because they provide evidence of the early civilizations that existed in Goa.
Morlem is a village located in the Pernem taluka of Goa. The site contains a number of dolmens, which are believed to date from the Megalithic period. The dolmens are stone chambers that are covered by a large stone slab. The dolmens are significant because they provide evidence of the early civilizations that existed in Goa.