How can a machine make work easier for you?

a. by decreasing the amount of work you do on an object
b. by changing the direction of your applied force
c. by increasing the the work done by the machine
d. none of the above

i think maybe a. but i'm leaning towards d.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

The chart shows daniela’s run through her race. what is her velocity? 1.5 m/s 2 m/s 2.5 m/s 5 m/s