Please help?

Question
The Moorish idol fish lives in coral reefs around the world. Its oceanic environment is saltier than the environment inside its cells.

1. Which process contributes to the Moorish idol fish losing water to its surroundings

A. ion channels
B. facilitated diffusion
C. active transport
D. osmosis

2. The concentration of water is greater outside the cell than inside the cell.

What will happen according to the process of osmosis?

A. Water will move out of the cell, causing it to shrivel.
B. Water will surround the cell, keeping it moist.
C. Water will be repelled away from the cell, keeping it dry.
D. Water will move into the cell, causing it to swell.

3. Amoebas are single celled organisms that take in particles, and sometimes smaller organisms, as food by enclosing the food particle in its membrane. The amoeba requires energy for this process.

Which structure in an amoeba produces the energy it needs?

A. nucleolus
B. vacuole
C. mitochondria
D. vesicle

4.
Read the paragraph.

Despite its name, the Pacific sea horse is actually a type of fish. Its horse-shaped head gives it its name. This creature lives in the Pacific waters off the west coast of the Americas, from Peru to Southern California. Like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment. When a sea horse sees a predator, its nervous system kicks into high gear.

Which structure is responsible for transmitting signals from one nerve cell to the next

A. Golgi body
B. nucleus
C. cell membrane
D. ribosome