Need a bio expert to help me with this! Explain why it's that answer, and please answer ONLY if you have already know --don't guess

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Hector is back from his morning run and is feeling light-headed because his energy is depleted which food item will provide him with a quick source of carbohydrates

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast