Unfortunately won't let me put the question for some reason, so I'll provide the question in the screenshot, please read...

I get you :-)

If supposedly there were air spaces in the palisade cell,it would have fewer chloroplasts that carry out photosynthesis.Hence photosynthesis won't be as effective.

Hope this made sense

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.