Answer: D
They often occur spontaneously, because when energy is released during a chemical reaction it does not usually happen slowly.
The organ near the stomach that produces, stores , and eliminates blood cells is the spleen.
Answer : (1) The correct option is, (A) increases
(2) The correct option is, (C) Decreases
Explanation :
Gravitational force : It is defined as the gravitational force is directly proportional to the product of the masses of the two object and an inversely proportional to the square of the distance between the two object.

where,
F = gravitational force or gravity
M and m = mass of two object
r = distance between the two object
G = gravitational constant
When the mass of an object increases then the gravitational force or gravity is increases because gravitational force is directly proportional to the mass of an object.
When the distance between the two object increases then the gravitational force or gravity is decreases because gravitational force is inversely proportional to the distance between the two object.
Hence, (1) As mass increases, gravity increases. (2) As distance increases, gravity decreases.
Answer:
the answer is Z
Explanation:
The reason being is because the definition of potential energy is the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors. So the highest point of energy is when the coaster is at point X.
Hope this helps.