<span>Serafina is most likely at the formal operational stage. During this stage children begin to think abstractly and independently developing their own ideas and opinions. Their reasoning skills and logical thinking become a major part of their thought process during this stage. Once this stage is reached by older children it will stay with them throughout life.</span>
We know that terrorists are seeking nuclear weapons. Today, there are more than 1,800 metric tons of weapons-usable nuclear materials-highly enriched uranium<span> and plutonium—stored in hundreds of sites across 25 countries, some of them poorly secured. To build a bomb, terrorists won't necessarily look to the biggest stockpiles; they'll go where nuclear materials are the most vulnerable. That makes global nuclear security only as strong as the weakest link in the chain.
</span>
A B and C I think hopefully
Answer:
Encounter Hypothesis
Explanation:
The encounter hypothesis is one of the oldest theories that contributed to the understanding of the solar system and the planets.
This hypothesis says that a collision took place as a result of which a large amount of gas was released from the sun which was migrating more towards the same directions around the sun.
The sun eventually passed through a large, dense and thick interstellar cloud and it later appeared in the form of a gaseous envelope. This later gave rise to the creation of planets and finally formed the solar system. This entire formation of planets and the solar system took a huge amount of time.
This can be considered as an alternative to the nebular theory.
