Answer:
C) Gravitational force
Explanation:
Steve is whirling a rubber cork, tied with a string to his finger, over his head as shown in the figure.
The motion of the cork is similar to the motion of a planet in the Solar System around the Sun.
Therefore Gravitational force is similar to the tension in the string. The reason is because the planets revolve around the sun due to the Gravitational force due to which they are pulled towards the sun and do not stray away.
Answer:
Differential survival indicates that a particular advantageous trait is benefiting a species, allowing the species to survive and produce more offspring. In the case of the Fogg Dam toad, it is evident that they are highly invasive as a species because they have the beneficial traits of long legs and the ability to move both during the day and at night. They also move much faster per day than the established toads in this area. The species passed along these traits to their offspring, giving their babies the ability to run even faster to continue to survive the invasion.
Gravity and Heat
"...star formation begins when part of the interstellar medium--one of the cold, dark clouds... starts to collapse under its own weight. The cloud fragment heats up as it shrinks, and eventually its center becomes hot enough for nuclear burning to begin. At that point, the contraction stops, and a star is born."
