The following sentences state some causes and effects addressed in the passages. Identify which part of the sentence is the cause and which part is the effect by placing the tiles in the correct place in the chart.

1. When trees are cut down, soil gets washed or blown away.

2. Loose soil harms fish eggs.

3. A lack of top soil causes people to use more fertilizers.

4. Fertilizers pollute groundwater.

She took up a scalpel and slit the monkey's abdomen, making a slow and gentle cut, keeping the blade well away from her gloved fingers. the spleen was puffed up and tough, leathery, like a globe of smoked salami. she did not see any bloody lesions inside this monkey. she had expected that the monkey's interior would be a lake of blood, but no, this monkey looked all right, it had not bled into itself. if the animal had died of ebola, this was not a clear case. she opened up the intestine. there was no blood inside it. the gut looked okay. then she examined the stomach. there she found a ring of bleeding spots at the junction between the stomach and the small intestine. this could be a sign of ebola, but it was not a clear sign. it could also be a sign of simian fever, not ebola. therefore, she could not confirm the presence of ebola virus in this animal based on a visual inspection of the internal organs during necropsy.