HEL Which statement about plants is accurate? A.
Plants derive energy to grow from nutrients in the soil.

B.
Plants use sunlight and carbon dioxide to create food.

C.
Plants use oxygen and water to create food.

D.
Plants derive energy to grow from water and nutrients.

B. Plants use sunlight and carbon dioxide to create food.

Explanation:

This process is called photosynthesis

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

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.