Concept:Fluid-filled foetal membranes cushion the developing foetus against shocks and pressure.
Explanation:During pregnancy, the foetus is enclosed by membranes that contain fluid.
This fluid absorbs sudden movements and physical pressure from outside.
Thus, it prevents mechanical injury to the foetus inside the dam.
Among the labelled parts in the diagram, I and II are the fluid-filled protective membranes.
These parts act as shock absorbers around the foetus.
The remaining labelled parts are not mainly responsible for protecting the foetus from mechanical injury.
Answer:I and II (Option B).
