The greenhouse effect is the slow rise of the earth’s temperature because of the increase in carbon dioxide in the atmosphere.

• The correct answer is D. temperature.

Robots can’t get lost. They can ______________ through any environment.

• The correct answer is C. navigate.

Jack: Don’t you think having a robot do all the housework is a good idea? Ben: ______________

• The correct answer is B. No. My children will be lazy then.

• This response acknowledges the question but presents a reason for not agreeing with the idea, which aligns with the context of the conversation.