Cocaine and crack produce a euphoric rush by: blocking the actions of serotonin. depressing neural activity in the brain. blocking the reuptake of dopamine in brain cells. stimulating the brain's production of endorphins. preventing the body from producing endorphins.

preservation because he preserves part of the land and preserves means save

explanation:

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.