B, interrupted
Because the word "yet" interrupts the verb phrase "have not visited"
Main Idea: The main idea is that tigers are going extinct but now acts are being done to help this from happening.
SD1: "A study released that the world's wild tiger population has risen for the first time in century"
I can't figure out the other 2 details.
Sorry.
What help do you need since there is no material for me to try and answer here?
Answer:
28 true. Humus: the organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.
29 false, Soil organic matter is the fraction of the soil that consists of plant or animal tissue in various stages of breakdown (decomposition). Most of our productive agricultural soils have between 3 and 6% organic matter. Soil organic matter contributes to soil productivity in many different ways.
