Hello may u pls help me with this I'm hella counfused

Explanation:

(1) Is referring to Newton's first law, an external force (gravitational force) is applied to frogs motion, thus causing it to deviate from a straight line

(2) is referring to Newton's third law of motion, the action force is done by the ball hitting the ground and the direction is downwards, the reaction force is done by the ground transferring that same force to the ball, acting upwards

(3) I think it's also the first law, the person on a train is showing, the force to keep it at rest, the sudden halt of the train causes a reaction force to act on the person, does making the person move

(4) I think it's both Newton's second law and third law motion.

I hope these helps

(1) Is referring to Newton's first law -it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

(2) is referring to Newton's third- law for every action (force) in nature there is an equal and opposite reaction

(3) I think it's also the first law -it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

(4) Newton's second law and third law motion-for every action (force) in nature there is an equal and opposite reaction the acceleration of an object is directly related to the net force and inversely related to its mass

Explanation:

mark me brainy plz

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.