Drag each item to indicate whether it is a cause or effect of nutrient increase in the water supply.

Cause:

Animals waste appears in the water supply

Fertilizer is applied

Effect:

Water is unfit for aquatic life

Algal blooms occur

Explanation:

When fertilizer is added in water ,then it leads to the problem of eutrophication in which algal boom occurs due nutrient enrichment of water. The excessive growth of water plants use the dissolved oxygen and leave oxygen devoid water for other aquatic species. These aquatic species ultimately die due to lack of oxygen.  

Animal waste causes increase of chemical elements such as nitrogen, phosphorus and potassium and render water unfit for any life form

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation: