The system of checks and balances.
Answer:
A. Peasants burning down the rainforest in order to clear land for farming.
Explanation:
This is because they wanted to make room in their environment for healthy use and be able to plant crops and have farm life available for them. They wanted to survive in a successful physical environment.
Answer:
A. development of automobiles with lower nitrogen oxide and hydrocarbon emissions.
Explanation:
This act implements a comprehensive program to reduce air pollution to protect human health and environment, the amends made in 1990 focused on problems of acid rain, ozone depletion, and toxic air pollution, they established new auto gasoline reformulation requirements and set the Reid vapor pressure standards to control evaporative emissions from gasoline.
Answer:
Neutral stimulus
Explanation:
The neutral stimulus is a neutral stimulus. The neutral stimulus does not respond to an automatic response. In the classical experiment, there is a neutral stimulus that changes into the conditional response.
For instance when Puja called her friend there was ringing a caller tune that Puja does not like so much but her friend like it when same ring tone play on radio then Puja had not strong reaction about the ring tone but Puja friend like it so much so ring tone is neutral here for Puja because it does not elicit any strong emotions for that ring tone for Puja.