Emily's crops are dying; she noticed the ground has white spots on it and is cracked. What could be the cause?

a. Acid rain on soil

b. Salinization

c. Waterlogged soil

d. Desertification

the tricuspid valve is present between right atrium and right ventricle

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.