Can anyone please help with these question for my biology work please

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?