Answer:
Environmental scientists look for solutions to protect the environment, while chemists develop new products. 
Explanation:
The last two sentences use the conjunction while meaning <em>whereas</em>, i.e. indicating a contrast. So the purpose of sentences 3 and 4 is to contrast certain things about environmental scientists and chemists. However, the fourth sentence contrasts only <u>level of education</u> required for these jobs.
The third sentence refers to <u>actual</u> <u>work</u> that environmental scientists and chemists do. Therefore, this sentence most accurately describes a way in which the jobs of environmental scientists and chemists contrast.
 
        
             
        
        
        
Answer:
<u>Claim:</u> the voting age should be lowered to 16 years old.
<u>Opposing claim:</u> some people are against it because they believe that 16 years olds can not make informed decisions and are going to vote according to whim or how their parents tell them to vote.
<u>Counterclaim:</u> lowering the voting age is more likely to produce a better-informed body of voters since school can help them with courses for such thing. 
Explanation:
The claim in this text is that the voting age should be lowered since young people deserve to have a say in the direction of the country. Some of the reasons supporting this claim are that 16-year-olds are mature enough for this decision in contrast with teenagers of previous generations as shown in studies. Also, they are more informed and competent than adults. 
The opposing claim states that 16 years olds are not well informed, and they will vote according to what their parents tell them to vote or without consciousness. There are no investigations in the article that support the opposing claim.
The counterclaim says that as 16-year-olds are still in school, the education system can develop instruction courses to teach them about the candidates. As they have the right to vote, students will be motivated to learn about this topic.
 
        
             
        
        
        
Because the way the earth rotates on its axis and around the sun yearly which relates to why we have season when we have spring its getting close to the sun when we have summer its closest to the sun and when we have fall were leaving the sun and when we have winter its far from the sun but throughout the year daily we still get the ray of the sun for light.