Taiga is the largest Continental Biome. It experiences long, cold winter; short, mild summers; and low precipitation. It is characterized by Coniferous forests. It covers most of the Southern Hemisphere.
Answer:
The correct statement for comet is - ( a ) They have highly elliptical orbits around the sun
Explanation:
The comet is made up by the composition of dust , water , ice , rock and frozen gases like , the carbon dioxide , methane , ammonia and carbon monoxide .
Comet shows a process called outgassing , i.e. , the comet passes close to the sun , then they start to release gases , which is visible in the form of a comet's tail .
The comet and its tail glows by the sun and becomes visible when the comet passes through the solar system , because the dust partials reflects sunlight directly and the gas glows due to ionization process.
The orbital of comet is usually highly eccentric elliptical path .
4.6 billion years ago - most likely hydrogen (H2) and helium (He)
probably rich in hydrogen compounds like methane (CH4), ammonia (NH3), hydrogen cyanide (HCN), water (H2O), and formaldehyde (HCHO). Also some N2, CO2 but LITTLE or NO free oxygen.
Molecules of H2 and He move really fast, especially when warm, that they eventually all escaped Earth's gravity and drifted off into space.
The second largest economic activity in Sub-Saharan Africa is farming
<h3>What is farming?</h3>
Farming refers to to the process of growing plants and animals.
There are two types of farming commercial farming and subsistence farming
commercial farming is the process of farming in large scale mostly using machineries while subsistence farming is a method of farming that is relatively small and hence di not require machines.
In sub-Saharan African mining is the major economic activity where countries like Nigeria depend more on extraction of mineral resources especially Gold and Oil.
The next after mining is farming
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