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