Why Is a Bird-Foot Delta Like That of the Present-Day

question 2

Multiple Choice

Why is a bird-foot delta like that of the present-day Mississippi below New Orleans likely to change naturally toward one with the shape of an equilateral triangle like the upper-case Greek letter delta (?) ?

• A)Present-day distributaries have higher gradients than potential new ones.
• B)Potential, new, major distributary channels have steeper gradients than existing channels.
• C)Potential, new, distributary channels have higher gradients, causing downcutting of the existing channels.
• D)Increased sediment loads since the mid-19th century have caused the major distributaries to be filled with sand.

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Definitions:

Navajo Skinwalkers

In Navajo culture, mythical witches believed to have the ability to transform into, possess, or disguise themselves as animals.

Transform

To make a thorough or dramatic change in form, appearance, or character of something or someone.

Anxiety

A feeling of worry, nervousness, or unease about something with an uncertain outcome, often reflecting a reaction to stress.

Cursed

Describes an object, person, or area afflicted by a supernatural power to bring harm or misfortune.