gravity

the pressure created by the oil pump

splashing action of the crankshaft

none of these

oil pan

cylinder head

oil pump

separate oil tank

oil strainer - oil pump - relief valve - oil filter - cylinder block - cylinder head - oil pan

oil pump - oil strainer - relief valve - oil filter - cylinder block - cylinder head - oil pan

oil strainer - oil filter - relief valve - oil pump - cylinder block - cylinder head - oil pan

oil strainer - oil pump - relief valve - oil filter - cylinder head - cylinder block - oil pan

camshaft

alternator shaft

crankshaft via drive belt

crankshaft directly

engine is cold

engine overheats

oil filter becomes clogged

engine runs at high speed