The creation of wildlife refuges and the enforcement of game laws are conservation measures that promote increased 1
use of biocides
2
preservation of species
3
use of biological controls
4
exploitation of species

2

Explanation:

The goal of the refuges is to protect species that would otherwise be at a relatively high risk. Said refuges and laws minimize things like poaching, overhunting of game and the sort, and generally unlawful killing of animals.

B) length of daylight

Explanation:

MORE POWER

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

2%? i tried finding the exact sorry if it's not 100% correct ; -;