Most generally speaking, the arrows in the food webs/chains represent the flow of energy.
Most typically, the energy will flow from the Sun to the plants, and then those plants are eaten and when they are eaten the energy flows from the plants to whatever animal ate them.
The correct answer is B.
Air pollution can cause cardiovascular diseases as the pollutants in the air can damage your heart and lungs. This isn't always the case but if you live in a highly polluted area you are running the risk of developing a cardiovascular disease as well as other diseases related to the inhalation and exposure of toxins and chemicals in the air.
The structure is called the Eustachian tube.
Hope I could help.
The answer is B i believe.
Your mindset is related to self confidence, because if you don't have the confidence to do something, and your telling your self you can't, you probably won't, because you have the mindset that you aren't good enough.
Attitude is related to mindset because If you go into something with a bad attitude, you have already made up your mind that you don't like something, and whatever your attitude is reflects your mindset.
Effort is related to mindset, because if you care about something or put alot of effort in something, you have a mindset that you will try your best, and you will.
Intelligence has nothing to do with mindset. YOu could be the smartest person in the world, but you can still have the same mindset as the dumbest person in the world if you have the same attitude, confidence, and effort.
Hope that helped!
