Answer:
C. Varieties of an element that differ only in the number of neutrons are called isotopes.
Explanation:
The Earth is approximately 
old. The solar system formed from giant gas clouds which was a part of the solar nebula.
The surface of soil which demarcates two soils of different geological ages is called a unconformity.
Palesol is the soil that lies between sediments or volcanic deposits. If the paleosol is older they have lithified rock.
Hence, option C is true.
Slogan: "No tax without representation"
Colonists protest the Stamp Act by refusing to buy British's goods.
Explanation:
they were fighting for equal rights for blacks and whites so they could be seen as one group and not separated
Episodic binge eating followed by purging is a characteristic of the condition called Bulimia Nervosa.
Bulimia Nervosa is a a eating disorder which is characterized by episodes of overeating called as binge eating followed by purging by self-induced vomiting.
It is a potentially life threatening condition in which there is over fasting that can be dangerous for life. It is mostly seen in teenage girls who are excessively self obsessed about their body structure.
It can cause dehydration, fatigue, electrolyte imbalance, anxiety and mood swings.
To learn more about binge eating here
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