Answer:
The author's purpose is to inform readers about a government website.
Explanation:
The passage details the facts about the government plans and the website made for the purpose of recommending healthy eating. The website, the plans, the providing of all "information about physical activity, calorie intake, and food groups" all move forward the main reason the government had started the program. So, the primary purpose of the author can be taken as an attempt to inform the readers about the government's website and the details of this website.
I would guess a semicolon. It is common for a semi-colon to be succeeded by a word like "however" or "therefore" and then a comma.
Hi, the answer is A. And the adjective clause in this example is "which Mom and Dad gave Billy just last week."
Age, Gender, Ethnicity, and probably Organizational affiliation.
