What effect would building a highway have on an ecosystem? A) increase in butterfly migration
B) Decrease in destruction of a habitat
C) Increase in carbon dioxide
D) Increase in oxygen

C

Explanation:

Building a highway destroys an ecosystem/habitat, so not b. With the ecosystem destroyed there will be a reduced number of trees that produce oxygen, so not d. Now you make an educated guess. If there is a large highway there will be a lot of cars which produce lots of carbon dioxide. No butterflies.

density and pressure

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.