Question

the mariana trench is an example of a
a) deep ocean canyon.
b) continental shelf.
c) continental slope.
d) paleo - coast.
question 8 (5 points)
whats one indirect consequence of building seawalls?
a) it causes an excess amount of fertilizer to become stuck in the sand.
b) the shoreline habitat is destroyed through loss of sand.
c) it increases the frequency of algal blooms.

Explanation:

• For the first question: The Mariana Trench is the deepest part of the world's oceans, which is a deep - ocean canyon. A continental shelf is a gently sloping extension of a continent under the ocean near the shore. A continental slope is the steeper part of the ocean floor that connects the continental shelf to the deep - ocean floor. A paleo - coast is an ancient coastline.
• For the second question: Seawalls are built to protect the shore from erosion. However, they disrupt the natural movement of sand. As a result, the shoreline habitat, which depends on the presence of sand (for nesting of sea turtles, for example), is destroyed. Excess fertilizer in sand is more related to agricultural runoff. Algal blooms are more related to nutrient (like phosphorus and nitrogen) enrichment from sources like sewage and agricultural runoff rather than directly from seawalls.

Answer:

1. A. deep ocean canyon
2. B. The shoreline habitat is destroyed through loss of sand.