Final answer:
Blood is a fluid connective tissue that transports oxygen and nutrients to cells, removes waste products, and performs other critical functions. The correct option in the student's question is that blood brings oxygen and nutrients to cells. Therefore, the correct option is 2.
Step-by-step explanation:
Blood is a crucial fluid connective tissue that circulates continuously throughout the body, transported by an elaborate network of blood vessels that include arteries, veins, and capillaries. Blood serves various essential roles, such as delivering oxygen and nutrients to the body's cells, transporting carbon dioxide and other metabolic wastes away from cells, fighting infections, repairing tissues, balancing hormones, and maintaining pH levels. It is the heart's pumping action that propels blood through the arterial system to reach every cell and then returns it back to the heart through the venous system. Addressing the student's question, the second statement is correct: '2) Blood brings oxygen and nutrients to cells.' This is fundamental as blood carries these vital substances to cells throughout the entire body, facilitating survival and function.
The other statements have inaccuracies: Blood is transported not only through veins but also arteries and capillaries. It does not carry carbon dioxide to cells for energy -- rather, it removes it as a waste product. Blood does not collect capillaries; it flows through them, exchanging substances with the cells around the body.