Answer:
The Continental Drift theory is a theory because there is no evidence to support it. Alfred Wegener developed the Continental Drift theory in the 1800's.
The answer is is third option
Answer:
Parasitism
Explanation:
Parasitism is a form of relationship in which one of the organism is being harmed while the other benefits. The organism being harmed is usually called the HOST while the organism that benefits is called PARASITE. Parasites often inflict certain health-related conditions on their hosts.
According to this question describing the mode of feeding of ticks, they are said to eat by taking blood from other organisms such as wallabies, lizards, echidnas and occasionally humans, which are all HOSTS.
In human hosts, this relationship with ticks can lead to symptoms such as itching, head aches and in extreme cases flu like symptoms, facial paralysis, and meat allergy etc. From the description above, it is clear that TICK has a PARASITIC RELATIONSHIP with its host as it brings only harm to them and benefits itself.
Northern lights or auroras can be seen within the ionosphere sub-layer. This is the range where cosmic and the Sun's radiation are ionized.
Answer:
An advantage of using natural gas
It is fairly safe for use in homes.
Explanation:
They are cheap ,plentifully available throughout the world. It is has multiple uses such as cooking, heating, drying and also for industrial use. It can be used for power generation. Through it plastics, paints and fertilisers can be made. This is the cheapest source for the production of hydrogen. It can easily be shifted from the power plants to the residential areas. It leave any gaseous waste rather not polluting the underground water.
