How does a stimulant, such as an amphetamine affect attention? Select one:
a. They impair attention at all levels,
b. At low levels, they increase attention. At high levels, they impair it,
c. They increase attention at all level,
O d. At low levels, they impair attention. At high levels, they increase it

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his 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