What has not increased the worlds food production in the last 100 years? A artificial selection
B herbicides
C natural selection
D pertcides ​

The answer must be c: natural selection

Explanation:

All the other answers only help rappid food production which will lessen the use of natural selection over time.

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.