Science help!!! please?

Question

Science help!!! please?
1.The density of water = 1.0 g/ml, gycerol = 1.26 g/ml , and oil = 0.9 g/ml. These density are similar. However, their ranking for flow rate is different. Why their flow rate is different?

You can explain it like this-
Explain using the particle theory. Particle theory states all matter is made up with tiny particles.

answer the question no 1 or answer it by using the particle theory.
Please help me.

Answer 1

Water is a small molecule - H2O.

Glycerol is a larger molecule than water - C3H5(OH)3.

Oil, as in petroleum oil, is a mixture of various molecular weights with long carbon chains of 20 to 70 carbons which is larger still than Glycerol.

Since oil is the largest group of molecules, its flow rate should be the slowest using the particle theory. Glycerol should be slower than water. Water should flow relatively quickly.