PLEASE HELP WITH THIS ONE QUESTION What systems supply food and oxygen needed for respiration?

A) excretory, digestive, and respiratory

B) excretory, respiratory, and cardiovascular

C) digestive, respiratory, and cardiovascular

D) digestive, excretory, and cardiovascular

What do animals wth echolocation have in common other than echolocation

Texas has an impending storm, and california is experiencing a water crisis. match the technologies with the state that can use them to reduce the effects eddies natural hazards. texas is the storm cellar and the wood that is crisscrossed. california is the dam and the storage tanks

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food