Answer:
They developed many techniques for structures and construction of all types, including some inventions.
Explanation:
According to Kuhn, the set of beliefs, values, assumptions, and a particular way of doing research which are accepted by a group of scientists is called paradigm.
There is no consideration and therefore no enforceable contract for transactions relating to Gifts.
A gift is a contract without fair consideration and requires performance to be valid. A valid gift is therefore a concluded contract by the giver's actual delivery of the gifted item to the donee or someone on behalf of the donee, or by the giver's delivery of the means of obtaining the gifted item without further action for possession.
The intention to give must be accompanied by service, and service must be done with the intention to do. Otherwise, there is only the intention or promise of being gratuitous, and it is simply void. The transfer of ownership of the gift item or means of obtaining it is essential to making a valid donation, in order to render it an irrevocable disposal.
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The problem of waste can be tackled in many ways, such as:
producing less waste (the most important way of reducing waste)
reusing the objects rather than throwing them away after one use
recycling the objects that have to be thrown away
so all the options are correct - all of the above!
These are all tests for people who want to enter graduate degree programs.