Superposition and geologic timescale support the theory because of the changes in features in index fossils of diverse periods are presumed to be caused by evolution, and the existence of different organisms in different periods is then used to support biological evolution.
A fan-shaped deposit <em>(of sediment</em><em>)</em> at the mouth of some rivers is called b) an alluvial fan.
A <em>dune</em> is a mound of sand shaped by wind.
A <em>delta</em> is a sort of "tree" of splitting rivers at the mouth of a river.
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Answer:
sea trade
Explanation:
The control of sea trade, the chief source of Portuguese wealth in the East, was assured by the defeat of Muslim naval forces off Diu in 1509.
Portugal's main natural resources include fish, forests (cork), iron ore, copper, zinc, tin, tungsten, silver, gold, uranium, marble, clay, gypsum, salt, arable land and hydropower.