The heavier elements in the universe were formed by (apex)

Nuclear burning

Explanation:

Nucleosynthesis

Explanation:

The heavier elements in the universe were formed by the process of nucleosynthesis, in which lighter nuclei undergoes fusion in order to form a heavier nuclei. This process requires a high speed for collision, and is possible with extremely high temperature. The minimum amount of temperature that is needed for hydrogen fusion is about 5,000,000°C. It is believed that, the heavy elements, ranging from oxygen to iron are created in the stars that are comprised of nearly ten times as much of matter as it is present in the Sun.

In order to form elements heavier than iron and nickel, it requires significantly huge amount of energy. During a supernova explosion, the fuel supplies are exhausted in the cores of giant stars and it completely gets burn, forming heavier elements such as iron, lead, nickel, uranium.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.