he couldn't risk to retire from work
to mess with an opponents thing. I.e. I am in a science fair and i go unplug my opponent's science project. that is sabotage
Have* this is because has* is past tense and have is more appropriate since there are multiple things you are referring too (Mercury, Venus, Earth and Mars). To be honest, these planets have a molten core.
It emphasizes tension
In the passage, Death was personified to show how the old
man seems to have perceived his impending death despite not having seen nor
heard the presence of the murderer in the room. Death had the characteristics
of having the ability to stalk, to have a shadow and to envelop its victim. All
of which are humanistic attributes that death in its real sense could not
possibly enact. It creates the tension on the murder that is about to happen
and the thoughts of the murderer on his victim.
The Soviet Invasion of Afghanistan and the U.S. Response, 1978–1980. At the end of December 1979, the Soviet Union sent thousands of troops into Afghanistan and immediately assumed complete military and political control of Kabul and large portions of the country.