1. Over-hunting
2. A disappearance of a primary food source
<span>3. Drought</span>
Answer:
A
Explanation:
Because Jessica pushes a 25 kilogram cart a distance of 10 meters.
Well, that would be a plane (flat) mirror
<span>provided that </span>
<span>the mirror and the object are oriented parallel to each other</span>
In the diagram, the ship send sound(?) waves to the water, to determine if there is anything there. If there is something like a sunken ship shown in the diagram, the waves return in a shorter time hence you can understand if theres something or now. This is the principle of radars and sonars.
