Questions

Burning gasoline is the only process that involving in a chemical change in the given options. A chemical change is a change in the starting substances that are called reactants from the formed new substances that are called products. 

Here, the error is in part 4. As 'messages' is plural “speaks” will be replaced by “speak”. The rule applied is of subject verb agreement

Describe your ideal job?

You should use this question to relate to the post you applied and give them the feel that this is close to your ideal job. So align your wonderful ideal job reasons to the responsibilities of the job posting. 

This is a question that you can use to add some humor or do a icebreaker like just joking that your ideal job is to work in a space station or would like to work in Hollywood but after a quick laugh give a realistic answer like my ideal job is where i get more responsibilities, enhance my skills and grow, and of-course you can add saying you would like to be part of a team where work is fun. If you want to go further, You might add at the end you heard good things about the work environment in the interviewing company.

Primary succession is the orderly and predictable series of events through which a stable ecosystem forms in a previously uninhabited region. Primary succession occurs in regions characterized by the absence of soil and living organisms.