answer:There is uncertainty or doubt whether the price of oil will rise next year.

answer:1. Initialize a variable "sum" to 0. 2. Use a for loop to iterate through numbers 1 to 100. 3. Within the loop, use an if statement to check if the number is even. 4. If the number is even, add it to the "sum" variable. 5. After the loop completes, print the value of "sum". Here is the code: ``` sum = 0 for num in range(1, 101): if num % 2 == 0: sum += num print(sum) ```

answer:Supply and demand is a basic economic concept that explains how the availability of a certain product or service (supply) and the level of consumer demand for that product or service affect its price in the market. When the supply of a product is high and the demand is low, the price tends to be lower. On the other hand, when the supply is low and the demand is high, the price tends to increase. The interaction of supply and demand ultimately determines the market equilibrium price and quantity of the product or service.

answer:A virus is a microscopic infectious agent that can only replicate inside a living host cell, while bacteria are single-celled microorganisms that can survive and reproduce on their own or in a host organism.