Which statement is a scientifically accurate description of velocity? 1. The boat traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

2. Walking south along the two-mile canyon trail generally takes less time than traveling the same trail north because walking south is all downhill.

3. The hiker began hiking the park's five-mile north hiking trail at 8:00 a. m. with plenty of daylight left to complete the hike before dark.

4. The motorcyclist traveled along a highway at 55 mph and reached the campsite in less than the two-hour estimated time.

The motorcyclist traveled along a highway at 55 mph and reached the campsite in less than the two-hour estimated time.

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun

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.