Question

Read the passage carefully: (1).We have all perhaps had our first encounter with this magnificent species at an early age – through pictures in our science or general knowledge books, or through television cartoons, but few of us know more about them than the statement ‘Largest mammals in the world’. Whales. (2).Apart from being the world’s largest, they are also among the oldest living species on the planet – some scientists estimate their ancestral species (the species which they are closely related to) might even have been around at a time predating dinosaurs! The anatomy of whales is something of a mixed bag. Despite living in the cold, dark waters several metres below the surface, whales do not have gills. They have lungs, just like we do; they need oxygen. This is why whales will come up to the surface – to catch a whiff of the fresh air of the open sea they need to survive. This is also the time one can truly appreciate the size of a huge humpback whale. (3). As such, the experience in the islands of Luzon, Philippines is unparalleled. The Philippines are home to a nearby cousin of the Humpback whale – the Oslob Whale-Shark. These whales are relatively smaller than their cousins, but are known for their distinctive white spots throughout their body. Since they swim closer to the surface, at Philippines, one can interact with them a little more closely. Tourists can snorkel or scuba dive with these whales, they are very passive and friendly. These whales, and especially the humpbacks, are of more economic importance than we realise. These whales consume plankton from the depths of the ocean, in the process they circulate vast amounts of water making sure vital dissolved gases like nitrogen are continually refreshed at the upper layers of the ocean. This abundance of nitrogen ensures that several other species of fish are sustained and have enough nutrients to eat and thrive. Further, they also bring up some of the phytoplankton to the top of the surface. These phytoplankton now see the light of the sun, can photosynthesize, and produce over 15% of the oxygen present in the atmosphere at any given time.​

Answer 1

Answer:

sorry didn't understand