Answer:
Keelboats have been used for exploration, such as during the Lewis and Clark Expedition, but were primarily used to transport cargo or settlers in the early 19th century. The process of moving a keelboat upriver was extremely difficult, though current dependent.The earliest keelboat seems to have been a skiff with a plank nailed the length of the bottom to make the boat easier to steer, but by about 1790 the keelboat had become a long narrow craft built on a keel and ribs, with a long cargo box amidships.
Explanation:
This is known as biodiversity. Biological diversity, or biodiversity, is the diversity of all living organisms in a biome or an ecosystem. It increases over time as new species are differentiated all the time and at a faster pace than other organisms become extinct. The longer the time the more the organisms will be created due to genetic differentiation.
A census<span> is the procedure of systematically acquiring and recording </span>information<span> about the members of a given </span>population. It is a regularly occurring and official count of a particular population.[1]<span> The term is used mostly in connection with </span>national population and housing censuses<span>; other common censuses include agriculture, business, and traffic censuses. The </span>United Nations<span> defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every 10 years. United Nations recommendations also cover census topics to be collected, official definitions, classifications and other useful information to co-ordinate international practice.</span>[2]<span>[3]</span>
