How is weather ,climate , and biodiversity on earth interconnected?

Biodiversity can be seen within species, between species, and within and between ecosystems. Although biodiversity is hard to measure on a global scale, in recent years there has been scientific consensus that the planet’s biodiversity is in decline. That’s not great news, because in general, the more species that live in an area, the healthier that ecosystem is—and the better off we humans are.

Explanation:

the volume increases

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.