
    Design a text simplification function for an adaptive learning system that creates modified versions of student responses by removing every other character from the original text, helping to generate varying difficulty levels for reading comprehension exercises. The function should process any given student response string and return a simplified version containing only the characters at even positions (0-based indexing) from the original text.
    

    
def remove_odd(str1):
    """
    Design a text simplification function for an adaptive learning system that creates modified versions of student responses by removing every other character from the original text, helping to generate varying difficulty levels for reading comprehension exercises. The function should process any given student response string and return a simplified version containing only the characters at even positions (0-based indexing) from the original text.
    

    """
def remove_odd(str1):
    """
    Design a text simplification function for an adaptive learning system that creates modified versions of student responses by removing every other character from the original text, helping to generate varying difficulty levels for reading comprehension exercises. The function should process any given student response string and return a simplified version containing only the characters at even positions (0-based indexing) from the original text.
    

    """
    str2 = ''
    for i in range(1, len(str1) + 1):
        if i % 2 == 0:
            str2 = str2 + str1[i - 1]
    return str2